We've already told you about some of the new features of OS X 10.4.9 (besides the ability to spawn heated discussions over version numbering). But here are a couple of changes that might actually impact your everyday Mac usage.

As of 10.4.9, pressing the Eject key no longer immediately results in a disc being ejected. You actually have to press and hold the Eject key for a moment. I'm thrilled; I can't count the number of times that I've been reaching for F12 or the Delete key on my MacBook and accidentally hit Eject instead. I don't usually have a disc in my notebook, but on the occasions where I do, it's annoying.

While those Apple engineers were at it, they changed another shortcut involving the Eject key. You may know that if you hit control-Eject, it summons the "Are you sure you want to shut down your computer now?" dialog. Woe to the unsuspecting user who accidentally hit those keys, followed by the return key. Doh. Like with the Eject key alone, you now have to hold both keys down for a moment before the dialog pops up. If you're not a fan of the delay, notebook users can hit the Power key to summon the dialog immediately. And you can always go to the Apple menu and pick Shut Down, Restart, or Sleep.

Small changes, admittedly, but nice from a UI standpoint. Spending less time on things you didn't mean to do is always good for productivity.

This blog first appeared on our sister site MacUser (US).