OT question for techno gurus out there: when an installer says "Optimising Disk..." what is it actually doing? I'd assumed it was doing stuff like repairing permissions...
Optimising Disk means Updating the Prebinding. Not that I am a techno guru. I recently saw it on http://www.macdevcenter.com/lpt/a/4400 or http://www.macdevcenter.com/lpt/a/5825
Sometimes, for some (apparently) inexplicable reason, your computer slows down to a crawl after you have installed a big application.
In that case, you may want to "update the prebinding." This means forcing Mac OS X to go through all of the application files and make sure that they are correctly linked together. The Mac OS X default installer usually takes care of this by itself, but some third-party installers may be less cautious.
You can do that manually too. To do this, simply open your Terminal and type:
sudo update_prebinding -root / -force
Then, enter return, type your password, and enter return again.
Don't worry about the lines of text that will scroll on your Terminal. This simply means that the command is doing its work.
The whole process should only take a few minutes. However, it will considerably slow your computer down and for maximum efficiency, you should not use it at the same time.
Once the command has exited, immediately reboot your computer.
Terry
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