A serious bug (links to mirror of User Contributed FAQ on the bug) introduced by Mac OS X 10.3 (Panther's) more narrow definition of Firewire specs, requires specific firmware updates be given to Firewire drives before using with Panther or Apple's new Mac OS X 10.4 (Tiger) operating system.
In addition it is recommended these drives not be connected during the software installation update.
Although Macs are reliable machines, they are not exempt from hiccups.All you need to do is carry around a single USB flash drive to be ready for situations the require you to diagnose, repair, or experiment with Mac OS X.A new section on this FAQ discusses Tiger slowdowns.If unsure as to which of these causes is slowing down your machine, ask a technician to help you isolate it before attempting to use any software to fix the issue.If you are interested in just tips for upgrading your Mac, the Mac OS X Updating FAQ is now available.
It includes a link to the clean install myth which is a discussion of the kinds of installation which can be done to Mac OS X.
(Topics range from OS/software updates and troubleshooting, to hardware upgrades and repairs.)Apple Support/How-To Article Updates: - What to do if your Mac won't turn on - How to reset NVRAM on your Mac - List of Startup key combinations for Mac - How to set a firmware password on your Mac - How to use safe mode to isolate issues with a Mac - How to Use File Vault to encrypt the startup disk on your Mac - How to use LG Ultra Fine 5K Display with your Mac - Why you may see a progress bar when Mac wakes from sleep = Top of Page = Copyright © 1997-2017.
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You can seriously damage your Mac's software integrity if you use these tools indiscriminately.
Of all the least harmless tools you can use are those which manage your logfile cleanup which happens on a daily, weekly, and monthly basis when your machine is left on overnight.
Now I'm running the latest clamav-devel-master: Clam AV devel on mac OS 10.12 Sierra.