Mac Musings

Older Macs in the Age of Leopard

The Future of G4 iBooks in the Age of Leopard

Daniel Knight - 2007.10.22, updated

Apple announced the system requirements for Mac OS X 10.5 Leopard last week: a drive that can read the DVD install disc, at least 512 MB of memory, and an 867 MHz G4 or better.

There's only on G4 iBook that's not officially supported, and we have lots of tips on installing Mac OS X 10.5 on unsupported Macs in our article on Unsupported Leopard Installation.

First Generation

The iBook line was the last to make the transition from G3 to G4; the first generation of G4 iBooks was introduced in October 2003. The 12" model ran at 800 MHz, just shy of Apple's official requirement for Leopard, and the 14" model ran at 933 MHz. Like the "dual USB" iBooks, they had the same 1024 x 768 screen resolution; the 14" iBook just made the image larger. Graphics are driven by ATI Mobility Radeon 9200 4x AGP with 32 MB of VRAM.

With the move to the G4, Apple also moved the iBook line to USB 2.0, a big improvement over USB 1.1, especially for external drives. All G4 iBooks supported the 802.11g AirPort Extreme card.

These iBooks shipped with 128 MB of onboard memory, which can be supplemented by up to 1 GB of additional memory. (A 1 GB PC2100 memory module sells for as little as $65 these days, and a 512 MB upgrade costs just $12.) The hard drives were fairly lackluster affairs, and upgrading to a 5400 rpm drive with an 8-16 MB cache will help unleash the computer's potential, as will a 1 GB memory upgrade.

These iBooks should run Leopard nicely, even if the 12" model isn't officially supported.

Second Generation

In April 2004, the iBook reached 1.2 GHz (1 GHz for the 12" model), went to 256 MB of onboard RAM. ATI Mobility Radeon 9200 4x AGP with 32 MB of dedicated video memory rounds out the package. The top-end 14" 1.2 GHz iBook was the first iBook to ship with a SuperDrive.

As before, the 4200 rpm hard drive hobbles performance, and updating to a 5400 rpm drive makes a significant difference you'll notice right away. Memory can be expanded to 1.25 GB with a 1 GB memory module, which will also help unleash the hardware's full potential under OS X.

These should make very competent Leopard machines, and we recommend a 768 MB memory configuration (base 256 MB plus 512 MB) along with a faster hard drive for better performance, 1.25 GB (by adding a 1 GB module) for best performance.

Third Generation

The October 2004 iBook was pretty much just a speed bump. The 12" model went to 1.2 GHz, and the 14" to 1.33 GHz. Everything else remains the same.

Fourth Generation

The final revision of the iBook came in July 2005, when Apple bumped the 12" model to 1.33 GHz and the 14" to 1.42 GHz. Video was upgraded with ATI Mobility Radeon 9550 4x AGP (still with 32 MB of VRAM), and the new iBooks had 512 MB of onboard memory, allowing a maximum RAM configuration of 1.5 GB. (The 2005 iBooks use PC2700 memory, which currently sells as low as $12 for 512 MB and $65 for a 1 GB module.)

Except for the 12" 800 MHz G4 iBook, all of these are fully supported for Leopard, and it should run quite nicely with a minimum 512 MB upgrade. For best performance, a 5400 rpm drive with an 8-16 MB cache or a 7200 rpm drive will really help, and putting in maximum memory will let each of these iBooks reach its full potential.

Further Reading

• Low End Mac's Best iBook G4 Deals, updated biweekly.