If you are like me, you have quite a few 3rd party System Preferences panes installed. In 10.6, if any of them are 32-bit panels (in my case, that's most of them), then you need to re-launch System Preferences in 32-bit mode to load them. I was getting bored of this and discovered a very simple workaround.
Select System Preferences in the Finder, select File » Get Info (Command-I), and tick the 'Open in 32-bit mode' checkbox. Job done.
I have not seen any problems using the Apple-provided panes in 32-bit mode. This simple trick will help any applications which are not fully 64-bit, particularly people who have a 64-bit app with 32-bit plug-ins, as described in this hint.
If you dislike the blue glow around Exposť windows in Snow Leopard, here's a simple fix.
Go to System » Library » Core services » Dock » (Control-click and choose Show Package Contents) » Contents » Resources. There you will find two files: expose-window-selection-big.png (for normal windows) and expose-window-selection-small.png (for minimized windows below the horizontal line).
If you change the color of these pictures in some image-editing program that preserves transparency, it will change the color of the 'glow' effect. Tip: To me, it looks the best if you use white, but pick whatever you like.
[robg adds: While this works, note that it breaks code signing on the Dock. This may or may not cause problems -- technically, I believe it means that the Dock no longer has access to anything in the keychain. Whether or not the Dock needs such access, I don't really know. But I tested this, and with the modified resources, code signing on the Dock is definitely broken. More info on code signing.]
Snow Leopard is here, so I thought I would install on a few machines to get a feel for the issues/problems before trying to deploy.
Two out of the five machines I tried would not allow the install to take place. Curious indeed, as all machines were pretty much identical, or so I thought. After going through my notes, I realized that these two machines had Boot Camp installed ages ago, so a partition had been added and then removed.
As such, the partition map was not allowing the install. To correct this, I used Disk Utility. I highlighted the main boot drive, clicked on the Partition tab, and then moved the partition line and moved it back to its original size. I then clicked Apply, and effectively the partition map was rewritten.
After what appeared to be my straight-forward upgrade, I found my Address Book reported no content and then froze -- requiring a Force Quit. When I launched Mail, initially it would open looking normal, but then it, too, would freeze. (Note: Once the problem with Address Book was solved, Mail was then OK.)
For me, after several hours working with AppleCare technicians, the cause turned out to be that my Address Book under v10.5.8 included a Smart Group with a negative condition (i.e., "Card is not a member of any group"). This was the only Smart Group I had created. The AppleCare technician ultimately found a report that such Smart Groups are not being handled properly during the upgrade.
I had done a SuperDuper! clone (on an external hard drive) of my MacBook Pro immediately before doing the upgrade. With the AppleCare technician pointing the way, I rebooted into Leopard from that external hard drive, launched Address Book, and deleted the Smart Group. I then copied the ~/Library » Application Support » AddressBook folder from the external hard drive (after adjusting Permissions, as needed) to the comparable location on my MacBook Pro once it was rebooted from its internal hard drive in Snow Leopard. But I wasn't out of the woods quite yet. Address Book would now launch, but it still claimed no cards existed. (There were, however, the proper 5,000+ cards in the Metadata folder within that AddressBook folder.)
One of the new features in Snow Leopard is that you can set a delay before the password is activated for your screensaver/wake from sleep. This is helpful because I had my password disabled previously, since I didn't want to enter it in all the time. However, the only options for the delay are: Immediately, 5 Seconds, 1 Minute, 5 Minutes, 15 Minutes, 1 Hour, 4 Hours.
For me, 15 minutes is too short and 1 hour is too long: I want 30 minutes. Fortunately, there is a way around this -- a simple Terminal command. The Terminal command is:
To set it to however long you like, edit the last item (1800, which is 30 minutes * 60 seconds/minute) to the desired delay in seconds. Copy and paste the command into Terminal, change the time limit, and hit Return. Now, all you have to do is log out and back in again and you're good to go!
I was playing around with Exposť in Snow Leopard, because I really like the new algorithm (or whatever they did to change it to make it look better).
I had my cursor hovering over a window and I hit the Space Bar, and the window zoomed up, just like using Quick Look on a document in Finder. This also works when using the arrow keys to select the windows.
I can see the benefits of this for if you have a lot of small windows that look the same, or if you just want to take a quick glance at a window before proceeding to another one.
Snow Leopard introduced a 'click and hold' feature for app icons in the Dock, to reveal application windows with a new 'Exposť in the Dock' effect. But most keyboard lovers don't really think that's too useful.
However, you can activate the effect from the Command-Tab switcher by pressing the Down or Up keys while holding Command. After the Exposť effect appears, you can release the Up/Down keys, and then press Tab or Shift-Tab to choose from opened applications.
But choosing a window needs too many key presses: You must at least press one arrow key (Up, Down, Left, or Right) to make the blue focus box appear. After you choose a window, press Space Bar to Quick Look the window, or press Enter to bring the window to front. (Of course, you can hover and click if you reach for the mouse, too.)