Install Mac OS X Leopard on a G4 800mhz Quicksilver

If you have an old G4 sitting around that’s at the 800mhz mark, you probably should try installing Leopard, because most people agree it actually runs FASTER than Mac OS X 10.4 Tiger. Weird, huh? I guess they’ve optimized the code pretty well.
However, when you try to install the operating system, you are warned that Leopard cannot be installed on your G4. There are a few reasons for this:
1) Leopard requires 512MB of RAM – you have RAM, right?
2) Leopard requires over 867mhz processor

We can fix number 1 by simply getting more RAM. I find Craigslist to be of great use here. Number two is a bit more difficult as G4 processor upgrades are ridiculously expensive once you consider the cost of a Mac Mini, and also requires a bit of tech savvy under the hood as you’d be swapping CPUs.
Not to worry, though. Here’s a way to convince OpenFirmware that your CPU is 867mhz, and allow the installer to boot, install, and get you off and running:
Boot into Open Firmware, I have covered this extensively here:
Once in OpenFirmware, issue the following commands (for single CPU):
dev /cpus/PowerPC,G4@0
d# 867000000 encode-int " clock-frequency" property
boot cd:,\\:tbxi

For dual CPU:
dev /cpus/PowerPC,G4@0
d# 867000000 encode-int " clock-frequency" property
dev /cpus/PowerPC,G4@1
d# 867000000 encode-int " clock-frequency" property
boot cd:,\\:tbxi

Note that all we are doing is over-writing the CPU clock-frequency (speed) property for each CPU installed, at boot time.
Also, if you need to boot another device, try:
printenv boot-device
This will return a list of boot devices to use when booting the installer. I used this in order to boot a Firewire device that had had a disc image (DMG) restored to it, making things a bit easy and faster.

Good luck!

Disable the Dock in Apple OS X Tiger

Many people find that they simply don’t have enough screen real estate on their MacBooks, and prefer to use application launchers such as Apple’s own Spotlight, or the third party applications QuickSilver and launchbar.

There are two ways to remove the Dock from OS X tiger – one easy, the other a more manual approach.

We’ll start with the hard one, since it’s better to understand what’s going on behind the scenes. If this simply doesn’t interest you and you’d rather move on – rest assured that scripting the hard part is just as safe, and works in a similar manner.

On to the hard part:

  • The first step is to move the dock from /System/Library/CoreServices so that it won’t be launched on startup as it is normally. This is a bit hackish, but I’ve yet to get anything else working properly.
  • Since the dock will no longer be called at startup as it is missing from the usual cave it hides out in, we’ll need to make the Dock start up from it’s new location when we log in. This can easily be accomplished by dragging from its new hiding place to your startup items (found in the “accounts” system preference pane).
  • Since the idea here is to get rid of the Dock, we’ll need to close it after it is run on login. The easiest way to do this is to make an Applescript that terminates the dock for you, and have it run just after the Dock is launched on startup. This allows the Dock to start, get it’s act in gear, then disappear.
  • Now you can proceed with your normal modus operandi and utilize QuickSilver or whatever other application launcher that you prefer to use instead of the Dock.

The easier way to do all of this is to leverage a piece of software written by No Name Scriptware called Dock Death. Dock Death is an AppleScript that performs the same task we outlined above, and also gives you a back out strategy in case you really need to get the Dock back.

Both of these solutions will effectively disable Expose since it a Dock process. If you can’t live without Expose, you may want to try using the freeware Onyx, which allows you to move the Dock to the top of the screen and hide it, effectively eliminating it from view. Though this is a bit low-tech in that it doesn’t really disable the Dock, for some people it gets the job done.