Apple Inc. inaugurated its Power Macintosh G4 desktop lineup in 1999 with 350- and 400MHz processor machines running Mac OS 8.6. Between Mac OS 8.6 in 1999 and the release of Mac OS X v10.6 Snow Leopard in 2009, Apple debuted five operating system versions, including its move from the Classic OS to Mac OS X in 2001. Depending on their processor speeds, Power Mac G4s can’t be upgraded beyond Mac OS X v10.4 Tiger or Mac OS X v10.5 Leopard, the operating system predecessors to Snow Leopard.
The titanium PowerBook G4 models initially ran on the Mac OS X 10.4.11 'Tiger' operating system. They also support Mac OS 9.2.2, which was the final release of the classic Mac OS operating system. For the final few titanium models, Apple switched to the Mac OS X 10.5.8 'Leopard' operating system. The superb OSNews reported that using LeopardAssist, it took merely 'a few clicks' to install Leopard on a dual 450 MHz-equipped Power Mac G4 upgraded with 1 GB of RAM and a Quartz Extreme capable video card - which is required for Core Animation and Time Machine. Mac OS X Leopard Install DVDVersion 10.5.42Z691-6232-A. If anyone has trouble getting this burned disc to be seen during the initial disc boot phase, I've found the G4/G5 factory optical drives are pretty terrible at reading burned DVDs.
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Graphite Power Macintosh G4 Systems
Apple Inc.’s initial Power Macintosh G4 desktop systems debuted in 1999 with a motherboard design updated from the company’s preceding G3 line of desktops. These G4 systems also featured an updated version of the casework from the “Blue and White” G3 computers, this time capped with a bluish-gray faceplate in the signature color Apple dubbed graphite. This G4 design series ended in 2001 with 733MHz systems that can run Mac OS 9.1 through Mac OS X 10.v4.11 Tiger, but miss out on Mac OS X v10.5 Leopard because they fail to meet its 867MHz minimum processor speed requirement.
QuickSilver Power Macintosh G4 Systems
Power Mac G4 Monitor
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Leopard For Power Mac G4 Usb
In 2001, Apple replaced its graphite casework with a design known as QuickSilver, featuring an updated faceplate applied to a similar housing. While QuickSilver G4s looked considerably different from their graphite predecessors, they merely evolved the PowerPC system lineup, offering incremental rather than revolutionary improvements. These machines ranged in speed from 733MHz to dual 1GHz processors. Later QuickSilver systems that feature 933MHz or faster processors can run the Macintosh operating system up through Mac OS X v10.5.8 Leopard, while the speeds of the slower QuickSilver machines restrict them to Mac OS X v10.4.11 Tiger.
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Mirrored Drive Doors Power Macintosh G4 Systems
Apple refreshed its G4 system design once again in 2002, debuting the Mirrored Drive Doors systems, most of which featured dual processors. Externally, these desktop systems once again contrast with the preceding lineup thanks to their faceplates. The Mirrored Drive Doors system lineup started at 867MHz and ran up through 1.44GHz, all of which offer enough processor speed to run Mac OS X v10.5.8 Leopard. These systems ended Apple’s run of successively faster PowerPC G4 designs, with the next generation of professional desktops incorporating the G5-series CPUs and sporting completely new casework.
Power Mac G4 Upgrade
Snow Leopard Requirements
Leopard For Power Mac G4 Specs
Installing Mac OS X v10.6 Snow Leopard requires a Mac with an Intel processor, at least 1GB of RAM and 5GB of free disk space. While any Power Macintosh G4 system can meet the latter two qualifications, none of them support nor include an Intel processor, nor can they be upgraded to incorporate one. Even the Power Macintosh G5 systems that followed the G4s in Apple’s PowerPC-based lineup fall short of the qualifications for Snow Leopard, the first Apple operating system to break with a preceding generation’s CPU design since 1998, when Mac OS 8.5 required a PowerPC processor.