The January 2003 Power Mac G4 was the first to require OS X. It was also the first with FireWire 800 ports. A good rule of thumb: If it has FireWire 800, it isn’t meant to boot OS 9, although we have heard of a workaround. The FireWire 800 model was also the first Power Mac with a Bluetooth socket and support for 802.11g AirPort Extreme.

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Manually activating power management on Macs Follow the instructions below for Mac OS X Version 10.4, nicknamed 'Tiger'. Steps for activating sleep settings in other versions of OS X will be very similar. Click on the apple symbol (Apple Menu) in the upper left of your screen. System requirements BrainVoyager 22.0 is compatible with macOS 10.15 (Catalina, recommended), macOS 10.14 (Mojave), and macOS 10.13 (High Sierra). It also works on macOS 11.0 (Big Sur) but you may experience some glitches in the user interface that will be fixed in an upcoming minor release.

Apple hit the 1 GHz mark in January 2002, 1.25 GHz in August 2002, and 1.42 GHz in January 2003. At the bottom of the new series, Apple dispensed with dual processors to keep the price down – the 1.0 GHz single CPU model retailed for just $1,499.

Still, Motorola remained “behind the curve” with G4 processor speeds, which, extrapolated from Moore’s Law, should have increased roughly 25% every six months. Instead, we had a decidedly overhyped 14% jump in CPU clock speed. On the other hand, the price is 18% lower than the MDD model, further improving the value of the Power Mac G4.

As with the MDD, the two faster versions have a 167 MHz system bus. All models have two media drives bays (so you can have a SuperDrive and a fast CD burner or a second SuperDrive), four RAM sockets, and three independent drive buses that each support two devices. An Ultra ATA/33 (ATA-4) bus is used for the optical drive(s), Ultra ATA/100 (ATA-6) connects to the stock hard drive, and there’s also a normally unused Ultra ATA/66 (ATA-5) bus. Only the ATA/100 connector supports drives over 128 GB capacity. There are four 3.5″ hard drive bays inside the G4.

The fastest pair of new G4s have faster video cards, the ATI Radeon 9000. The dual 1.42 GHz model includes 2 MB of level 3 cache per processor, twice as much as the slower models.

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Beware Apple’s claim of “four USB ports” – there are two on the computer and two on the keyboard, so once you’ve plugged in the keyboard, you’re down to three available. Make that two after you plug in the mouse. Your best bet here is to add a USB 2.0 PCI card, which also overcomes the speed limitations of this model’s built-in USB 1.1 ports.

MacOS0Lives.com has documented a process for downgrading the firmware of this model so it can natively boot Mac OS 9. We’re hoping to find someone who has done the procedure who can distill this long thread into a more easily followed step-by-step process.

Keeping It Cool

Brain Power Mac Os 11

Two CPUs can run fairly hot. Use good thermal paste (Arctic Silver is one, and you should probably reapply every few years) or a really good thermal pad. Consider replacing some of the fans with ones that move more air (and, in some cases, will also reduce fan noise).

The Power Mac G4 (FW800) uses a copper heatsink, and The House of Moth has tested it against the aluminum heatsink used in the original MDD model. The copper heatsink runs cooler by roughly 5°F (2.7°C). If you need/want a Mac that still natively boots Mac OS 9, this is one more thing to help it keep its cool.

A Better Video Card

For everyday use, the stock video cards are just fine, but if you’re into gaming with this PPC Mac, you will want a better video card than the ATI Radeon 9000 Pro, which in some games will drop below 10 FPS. Again, The House of Moth provides an answer. By modifying an ATI Radeon 9650 from a Power Mac G5, performance in the OpenGL benchmark quadrupled compared to the 9000 Pro! This card also has 128 MB or, if you are lucky, 256 MB of video memory, which also helps with gaming performance.

“Games fly, even with all settings maxed out at full resolution. The card does run hot so I keep game settings medium-high until I can whack a fan on it or find another cooling solution.”

But you know gamers: Always looking for improved performance, and when Greg Hrutkay recommended the ATI Radeon X850 Pro with 256 MB of video memory to The House of Moth, they found one on eBay and installed it. As of Sept. 2018, we don’t have any more information on this upgrade, because the video card purchased on eBay is broken.

Details

• Introduced 2003.01.28 with 1.0 GHz single CPU, 256 MB RAM, 60 GB hard drive, Combo drive, and GeForce 4x graphics at $1,499; reduced to $1,149 on 2003.06.23. 1.25 GHz dual 256 MB/80 GB/Combo/Radeon 9000 introduced at $1,999; reduced to $1,699 on 2003.06.23. 1.42 GHz dual 512 MB/120 GB/SuperDrive/Radeon 9000 introduced at $2,699; reduced to $2,399 on 2003.06.23. Replaced by Power Mac G5 in mid 2003.
• requires Mac OS X 10.2 Jaguar through 10.5 Leopard
• CPU: 1.0/1.25/1.42 GHz PowerPC 7455
• Bus: 133 MHz on 1.0 GHz model, 167 MHz on faster ones
• Performance:
  • Geekbench 2 (Leopard): unknown (1.42 GHz dual), 1047 (1.25 GHz dual), 576 (1.0 GHz single)
  • Geekbench 2 (Tiger): 1165 (1.42 GHz dual), 1048 (1.25 GHz dual), 570 (1.0 GHz single)
• RAM: 256/512 MB standard, expandable to 2 GB using PC2100 memory in 4 DIMM slots in 1.0 GHz model, PC2700 memory in faster models
• Video: Nvidia GeForce 4 on 1.0 GHz model, ATI Radeon 9000 Pro on faster models; DVI and ADC ports, includes DVI-to-VGA adapter
• VRAM: 64 MB
• L2 cache: 256 KB on-chip L2 cache
• L3 cache: 1 MB on 1 GHz model, 1 MB per CPU on 1.25 GHz model, 2 MB per CPU on 1.42 GHz model
• Hard drive: 60/80/120 GB 7200 rpm ATA/100
• Combo (CD-RW/DVD) on 1.0 and 1.25 GHz models; SuperDrive standard on 1.42 GHz model, optional on others
• internal Zip 250 drive (optional)
• 4 64-bit PCI slots
• Modem: internal 56k v.92
• Microphone: standard 3.5mm minijack, compatible with line-level input, not compatible with Apple’s PlainTalk microphone
• FireWire 400: 2 ports
• FireWire 800: 1 port
• USB: 2 USB 1.1 ports
• Ethernet: 10/100/gigabit
• WiFi: antenna and connector for 802.11g AirPort Extreme card
• size (HxWxD): 17.0″ x 8.9″ x 18.4″
• Weight: 42.0 lb.
• Gestalt ID: n/a
• PRAM battery: 3.6V half-AA
• upgrade path: none yet, although CPU upgrades are likely
• Part no.: M8689 (1 GHz), M8840 (1.25 GHz), M8841 (1.42 GHz)

Brain Power Mac Os X

Accelerators & Upgrades

• 8x SuperDrive DVD±RW upgrade, MCE Technologies, $99. 8x4x12x DVD, 24x24x40x CD. 2 MB buffer.
• 3 CPU upgrades for Mirrored Drive Doors G4 Power Macs, Dan Knight, Mac Musings, 2007.05.22. If your Mirrored Drive Doors Power Mac isn’t fast enough, here are three CPU upgrade option to get you to 1.33, 1.6, and 1.8 GHz.
• Overclocking the Sonnet Duet 1.8 GHz, Jay, The House of Moth, 2018.07.01. It’s an easy mod to push this accelerator to 2.0 GHz.
• for CPU upgrades, see our Guide to Power Mac G4 Upgrades

Online Resource

• Picking Up a Used Power Mac G3 Or G4: Is It Worth It?, Dan Knight, Mac Musings, 2008.12.18. In some cases, shipping can cost more than the computer itself. Where are the best values?
• What’s the Best Version of OS X for My Mac?, Ian R Campbell, The Sensible Mac, 2008.02.28. Which version of Mac OS X is best for your hardware depends on several factors.
• Know Your Mac’s Upgrade Options, Phil Herlihy, The Usefulness Equation, 2008.08.26. Any Mac can be upgraded, but it’s a question of what can be upgraded – RAM, hard drive, video, CPU – and how far it can be upgraded.
• Downgrade Firmware of FW800 for OS9 Compatibility, MacOS9Lives.com, 2014.04.01. How to downgrade firmware on the FireWire 800 Power Mac G4 so it can natively boot Mac OS 9.
• Back to Pismo, Power Mac G4 CPU vs. video upgrades, faster YouTube with older Flash, and more, Charles W Moore, Miscellaneous Ramblings, 2010.01.20. Also still using an Apple IIGS, Delete vs. Backspace key, old iBook and PowerBook power consumption, iSlate speculation, and more.
• The Future of Up-to-Date Browsers for PowerPC Macs, Charles W Moore, Miscellaneous Ramblings, 2009.08.31. With Intel-only “Snow Leopard” shipping, software support for PPC Macs will continue its decline. Also, a look at SeaMonkey 2 and Camino 1.6.9.
• Optimized Software Builds Bring Out the Best in Your Mac, Dan Knight, Low End Mac’s Online Tech Journal, 2009.06.30. Applications compiled for your Mac’s CPU can load more quickly and run faster than ones compiled for universal use.
• Tips for installing or reinstalling Mac OS X 10.4 Tiger, Adam Rosen, Adam’s Apple, 2009.06.10. Mac OS X 10.4 uses less memory than Leopard, supports Classic Mode on PowerPC Macs, and isn’t supported on G3 Macs.
• Choosing My Next Low-end Desktop Mac, John Hatchett, Recycled Computing, 2009.05.19. The recently deceased iBook G4 was going to take up desktop duty. Now the options are a G4 iMac, 17″ PowerBook, Power Mac G4, and Power Mac G5.
• Does Using Matched RAM Make Your Classic Mac OS Machine Faster or More Stable?, Simon Royal, Tech Spectrum, 2009.04.28. Most Macs don’t need matched memory modules and seem to run just fine with mismatched brands and capacities, but matching modules may be a bit faster.
• Is Leopard Slower than Tiger on G4 Macs?, Simon Royal, Tech Spectrum, 2009.04.17. Truth be told, when you have 1 GB of RAM, Leopard benchmarks an insigificant 4% slower than Tiger.
• Is It Worth Maxing the RAM in Old G3 and G4 Macs?, Simon Royal, Tech Spectrum, 2009.04.15. Increasing memory can make your old Mac faster and make you more productive, but it probably won’t improve resale value by the amount you spend.
• MacBook design limits USB ports, Unibody audio prolem solved, G4 upgrades disappearing, and more, Charles W Moore, Miscellaneous Ramblings, 2009.02.18. How to get the headphone jack on Unibody ‘Books working again, no more dual 1.8 GHz G4 upgrades, and a letter of appreciation.
• PowerPC Architecture Was Not a Failure, Dan Knight, Mac Musings, 2009.02.16. CNET’s Brooke Crothers calls PowerPC a failed architecture, but 12 years of PowerPC Macs, IBM’s blade servers, and three game consoles tell a different story.
• Do G4 Macs Have What It Takes to Remain Useful in a Multicore World?, Simon Royal, Tech Spectrum, 2009.01.15. With dual-core Intel CPUs running beyond 2 GHz, is any G4 Mac a practical choice?
• 4 GB RAM problem persists after firmware update, TriBook concept MacBook, DIY Mac netbook, and more, The ‘Book Review, 2008.12.19. Also using third-party monitors with ‘Late 2008’ MacBooks, MacMagSaver protects MagSafe cord, $25 802.11g USB adapter, bargain ‘Books from $500 to $2,299, and more.
• The ‘Better Safe Than Sorry’ Guide to Installing Mac OS X Updates, Charles W Moore, Miscellaneous Ramblings, 2008.12.16. Most users encounter no problems using Software Update, but some preflight work and using the Combo updater means far less chance of trouble.
• Why You Should Partition Your Mac’s Hard Drive, Dan Knight, Mac Musings, 2008.12.11. “At the very least, it makes sense to have a second partition with a bootable version of the Mac OS, so if you have problems with your work partition, you can boot from the ’emergency’ partition to run Disk Utility and other diagnostics.”
• Will Snow Leopard Support Some PowerPC Macs?, Simon Royal, Tech Spectrum, 2008.11.26. It just doesn’t make sense that Apple would ship a new OS that won’t support Macs sold less than three years ago.
• The Long Term Value of a High End Mac, Andrew J Fishkin, Best Tools for the Job, 2008.11.21. Low-end Macs are more affordable up front, but the flexibility and upgrade options of a top-end Mac can make it the better value in the long run.
• Leopard runs very nicely on PowerPC Macs, Simon Royal, Tech Spectrum, 2008.11.19. Some claim that Mac OS X 10.5 is so optimized for Intel Macs that it runs poorly on PowerPC hardware. That’s simply not the case.
• Every working computer is useful to someone, Allison Payne, The Budget Mac, 2008.11.19. Whether it’s a PowerBook 1400, G3 iMac, or Power Mac G4, it could be all the computer someone needs.
• The future of PowerPC Macs and software as Snow Leopard approaches, Simon Royal, Tech Spectrum, 2008.11.13. Apple phased out Classic Mode and G3 support with ‘Leopard’ last year, and next year’s OS X 10.6 won’t support any PowerPC Macs. Will other developers abandon PowerPC as well?
• How to clone Mac OS X to a new hard drive, Simon Royal, Tech Spectrum, 2008.10.07. Whether you want to put a bigger, faster drive in your Mac or clone OS X for use in another Mac, here’s the simple process.
• 9 browsers for G3 and older G4 Macs compared, Simon Royal, Tech Spectrum, 2008.09.26. The latest versions of Opera, Safari, Shiira, iCab, Radon, Firefox, Demeter, Sunrise, and Camino that run on Mac OS X 10.4 “Tiger”.
• Tiger vs. Leopard: Which is best for you?, Simon Royal, Tech Spectrum, 2008.09.22. Two great versions of Mac OS X, but unless your Mac is well above the minimum spec for Leopard and has lots of RAM, stick with Tiger.
• Reconfiguring and repurposing a Power Mac G4, John Hatchett, Recycled Computing, 2008.09.18. These 1999 ‘Sawtooth’ Power Macs would be perfect for the science lab with more RAM, bigger hard drives, and a newer version of Mac OS X.
• Does running OS X system maintenance routines really do any good?, Charles W Moore, Miscellaneous Ramblings, 2008.08.26. Mac OS X is designed to run certain maintenance routines daily, weekly, and monthly – but can’t if your Mac is off or asleep.
• PCs not like Macs, Claris Home Page fan, iMac G4 upgrade tips, iBook prices, and more, Dan Knight, Low End Mac Mailbag, 2008.08.18. Also using PC3200 RAM in a Mirrored Drive Doors G4, cloning the classic Mac OS to a new hard drive, and thoughts on a Windows App Store.
• Unreliable Macs, future Apple CPUs, replacing a Mac Plus mouse, and more, Dan Knight, Low End Mac Mailbag, 2008.08.12. Also Windows Media Player content that doesn’t work on Macs, Leopard on a 700 MHz iMac G4, Apple’s $99 Pro Care service, and CPU options.
• The Compressed Air Keyboard Repair, Charles W Moore, Miscellaneous Ramblings, 2008.07.24. If your keyboard isn’t working as well as it once did, blasting under the keys with compressed air may be the cure.
• Turn your old Mac into a web server with Linux, Apache, MySQL, and PHP, Jason Packer, Macs in the Enterprise, 2008.07.09. Step-by-step instructions for installing and configuring Linux, Apache, MySQL, and PHP on an older Mac.
• How a heavily upgraded Power Mac G4 pulled me back from the Dark Side, Ben Zalutsky, No Windows for Me, 2008.06.23. Seduced by a quad-core Windows gaming rig, it was a 9-year-old Power Mac that brought him back to the Mac.
• Snow Leopard and the Death of PowerPC Support, Carl Nygren, Classic Macs in the Intel Age, 2008.06.23. It looks like Mac OS X 10.6 will only support Intel Macs – and possibly only 64-bit ones at that. Should G4 and G5 owners start looking at Linux?
• SheepShaver brings Classic Mac OS to Intel Macs and Leopard, Alan Zisman, Mac2Windows, 2008.05.20. Mac OS X 10.5 doesn’t support Classic Mode. Neither does Leopard. But SheepShaver lets you emulate a PowerPC Mac and run the Classic Mac OS.
• Macintosh peace of mind, PA Semi and the iPhone, $40 802.11g PCI card, and more, Dan Knight, Low End Mac Mailbag, 2008.05.01. Also Power Mac vs. Mac mini, more on DVD User Op Patch, 12″ vs. 14″ iBook, and VGA for a Power Mac 6100.
• OS X for PCs, Mac mini with HDTV, 802.11n options, upgrading from Mac OS 9, and more, Dan Knight, Low End Mac Mailbag, 2008.04.22. Also reviving a dead PowerBook 5300, Lucida Grande, external FireWire SuperDrive advice, OS X and the DeskWriter, and royalties.
• Intel mini vs. Power Mac, best keyboard ever, uses for old Macs, and more, Dan Knight, Low End Mac Mailbag, 2008.04.10. Also using Classic with Intel Macs, problems with Classic Mode, and collective nouns.
• Used Intel Mac mini vs. 867 MHz Power Mac G4 dual, Mark Garbowski, My Turn, 2008.04.07. Can a dual processor Power Mac hold its own against a Core Duo Mac mini?
• Leopard on a Cube, G4 CPU swap limitations, Power Mac G5 a good choice?, and more, Dan Knight, Low End Mac Mailbag, 2008.03.06. Also looking for a scanner that works with Panther and the hsitory of expansion slots in low-cost Macs.
• Safari 3.1 will be ‘crazy fast’, OS X 10.5.2 update, 20x SuperDrive from $35, and more, Mac News Review, 2008.02.15. Also Security Update for Tiger, Graphics Update for Leopard, Mac mini “as powerful as a larger desktop”, TechTool Deluxe update, and more.
• G3 and G4 Power Macs and Clamshell iBooks still useful, Ben Zalutsky, No Windows for Me, 2008.01.29. Intel CPUs may be blazingly fast, but the old G3 and G4 Macs have plenty of usable life left in them.
• Restore stability to a troubled Mac with a clean system install, Keith Winston, Linux to Mac, 2008.01.15. If your Mac is misbehaving, the best fix just might be a fresh reinstallation of Mac OS X – don’t forget to backup first.
• Upgrading a Power Mac G4 on the cheap, Mark Garbowski, My Turn, 2008.01.04. For under $200, the author upgraded memory, dropped in a SuperDrive, added a better video card, and moved up to USB 2.0.
• Flash drive reliability, going back to Tiger, Classic emulation, and more, Dan Knight, Low End Mac Mailbag, 2007.12.19. Also looking for good video card options for use with Leopard on older Macs, and one more unsupported Leopard report.
• Leopard DVD Player requires 1.6 GHz CPU, dual processor questions, and dual boot Macs, Dan Knight, Low End Mac Mailbag, 2007.10.24. DVD Player currently runs on any G3 that supports Tiger, but the new version needs 1.6 GHz of power and other bloat in Leopard.
• Leopard pales before Mac OS 8.5 for Macs left behind, dual processor benefits, and more, Dan Knight, Low End Mac Mailbag, 2007.10.23. Mac users may not remember that Mac OS 8.5 left behind some Macs just over two years old. Compared to that, Leopard users have it made.
• Road Apple nominations, OS X 10.5 on MDD Power Macs, UMPCs and Apple, and a broken power button, Dan Knight, Low End Mac Mailbag, 2007.10.12. Whether some additional Macs merit the ‘Road Apple’ label, Leopard on Mirrored Drive Doors Power Macs, the usefulness of ultrasmall computers, and dealing with an iMac with a broken power button.
• The future of Mirrored Drive Doors Power Macs in the Age of Leopard, Dan Knight, Mac Musings, 2007.10.09. Every indication is that the MDD Power Macs will be full supported by Leopard. Here’s what makes them a good bet for OS X 10.5.
• Shootout: Three high-end graphics cards for G4 Power Macs, Bare Feats, 2007.10.10. Radeon 9800 Pro vs. GeForce 4 Titanium vs. “experimental” GeForce 7800 GS in a Quicksilver 2002.
• Shootout: MaxPower G4/7448 upgrade versus similarly clocked Macs, Bare Feats, 2007.09.21. Single 2.0 and dual 1.8 GHz 7448 upgrade compared with other G4 upgrades and dual processor G5.
• APG Card Compatibility, The Mac Elite, 2007.08.09. Guide to which ATI and Nvidia AGP video cards are compatible with which AGP Power Macs.
• Make AGP 8x video cards work in G4 Power Macs, The Mac Elite, 2007.08.19. Instructions for disabling pins 3 and 11 so Mac compatible AGP 8x video cards will work in most G4 Power Macs.
• Upgrading a Power Mac G4, used Mac dealers, Tiger on a blue and white G3, and AAUI, Dan Knight, Low End Mac Mailbag, 2007.09.06. Questions about upgrading a Mirrored Drive Doors G4, dependability of used Mac dealers, and the wisdom of installing Mac OS X 10.4 on a blue and white G3. Also comments on AAUI.
• PC war losers, Mac ‘just works’, $68 802.11n for older Macs, a free font manager, and more, Mac News Review, 2007.08.31. Also DVD region locking, the iMac’s glossy screen, Mac mini powerful enough, Chromac iMac housings, SanDisk’s 8 GB flash drive, and more.
• Unmatched Classic Mac OS apps, TiBook reliability, Matias Tactile Pro 2.0 disappoints, and more, Charles W Moore, Miscellaneous Ramblings, 2007.06.18. Also Netscape 7 and 9, MacBook causing problems with iMac’s display, and graphics cards for a Power Mac G4 and an ADC display.
• Can you put 3 GB in a Mac mini?, where are the Mirrored Drive Doors CPU upgrades?, and more, Dan Knight, Low End Mac Mailbag, 2007.05.21. Also a challenge to ‘Mac-ify’ the Interweb, more on CRT voltage dangers, and fixing Low End Mac’s navigation bar in Firefox for Linux.
• Allegro USB 2.0 a great way to add several USB 2.0 ports to your Power Mac, Dan Knight, Low End Mac Reviews, 2007.03.28. You can never have too many USB ports. Whether your Power Mac has no USB 2.0 ports or too few, this $30 card is a great way to add the ports you need.
• 11 No Cost Tips for Optimizing Mac OS X 10.4 Tiger Performance, Ed Eubanks Jr, The Efficient Mac User, 2007.03.12. If your Mac is getting sluggish, here are 11 tips that can help restore its original performance.
• $25 802.11g card for PCI Macs, drive support for 802.11n AirPort Extreme, Adtron ups flash disks, and more, Mac News Review, 2007.03.02. Also firmware update info for Intel Macs, washable medical mouse and keyboard, TechTool Protogo, and more.
• Adding an Intel Mac mini Can Be Cheaper than Upgrading a Power Mac G4, Dan Knight, Mac Daniel, 2007.02.14. Looking at the cost of upgrading memory, adding a fast hard drive, and a GHz-plus CPU upgrade, buying a new Core Duo Mac mini makes a lot of sense.
• Upgrade Your Power Mac or Buy an Intel Mac mini?, Dan Knight, Mac Musings, 2006.11.30. With 1.8 GHz dual G4 upgrades selling for US$600, it might make more sense to add a Core Duo Mac mini than upgrade the processor.
• Disabling deep sleep on MacBooks, ‘Other Red’ a scam?, mixed RAM can reduce performance, and more, Charles W Moore, Miscellaneous Ramblings, 2006.11.13. Also other disk utilities Mac owners should know about, Lombard cooling, Netscape 7 on OS 9, Final Vinyl for ripping LPs, and more.
• Why a 7-year-old Power Mac G4 replaced a Mac mini, Andrew J Fishkin, The Mobile Mac, 2006.10.31. There’s a lot more to productive computing power than CPU speed. The old Power Mac lets you add a second video card, a fast hard drive, and lots more that the Mac mini can’t.
• Region Free DVD Viewing Options for Intel and PowerPC Macs, Andrew J Fishkin, The Mobile Mac, 2006.09.12. Several hardware and software options that will let your view ‘wrong region’ DVDs on your PowerPC or Intel Mac.
• Suggestions for converting AIFF to MP3 in iTunes, taken on eBay?, G4 upgrades, and low end Mac sadness, Dan Knight, Low End Mac Mailbag, 2006.07.19. Reader suggestions for getting iTunes to convert AIFF to MP3, checking for dual processors, the upgradability of the Power Mac G4, and disappointment over discarded Macs.
• End of G4 models points to unprecedented value for used G4 Macs, Leaman Crews, Plays Well with Others, 2006.06.02. The PowerPC G4 may no longer have a place in Apple’s product line, but that’s a far cry from saying G4-based Macs are obsolete. If anything, their value is going to increase.
• Making the move from Jaguar (OS X 10.2) to Panther (10.3), Ted Hodges, Vintage Mac Living, 2006.04.11. One advantage of Apple’s “no upgrades” policy for OS X – someone can give you their old copy after upgrading without worrying about violating their license.
• What to buy when the old Beige G3 is just too sluggish, Ted Hodges, Vintage Mac Living, 2006.03.27. When your old Power Mac G3 just can’t keep up with your needs under OS X, it’s time to look at the used Power Mac G4 market. The difference in speed can be astounding.
• Picking a Power Mac G4: How much Mac do you need?, Charles Webb, PowerBook Beat, 2006.03.22. Today’s laptop computers can be great primary computers, but sometimes you need things only a desktop model can offer. A used Power Mac G4 can be a good choice.
• Sonata SD, Sonnet Tech, 2004.06.01. First new PCI video card for the Mac in ages sells for just US$99, supports OS 7.5.3 and later plus OS X 10.1.5 and later, works with VGA or old Mac monitors, 16 MB VRAM.
• 1000 MHz Power Mac bonanza, Bare Feats, 2003.04.12. Comparison shows how much a second CPU can help. “…it’s never a liability to have two processors.”
• Are two brains better than one?, Dan Knight, Mac Daniel, 2003.03.24. It sounds reasonable that two processors are better than one, but how much better is a dual processor Power Mac G4 than a single processor model?
• Power Mac 1.42 GHz “dualie” versus others, Bare Feats, 2003.03.18. It’s faster, but “If you are looking for the next big jump in CPU speed, you’re going to have to keep waiting.”
• Apple Specs: Power Macintosh G4 (FW800)

Cautions

• Leopard (Mac OS X 10.5) boot times for Power Mac with the GeForce 6200 fall into the 4-5 minute range, and was initially suggested that you install Leopard with the Mac’s original video card to avoid slowing down the process. “gotoh” has posted the fix in The Mac Elite Forum. The delay is due to Leopard not supporting temperature sensors in G4 Macs. Simply remove AppleHWSensor.kext from /System/Library/Extensions, and the delay goes away.
• Note that some vendors are substituting PC2700 RAM for PC2100 modules. Although PC2100 Macs can work with PC2700 RAM, you can’t use both types of RAM in the same machine. All installed RAM must be the same type, whether PC2100 or PC2700.

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