Who wants the excitement of installing a new operating system to be dampened by dastardly bugs? Here’s how to deal with problems you might encounter after installing OS X 10.5.
Stuck at the Blue Screen After you update to Leopard and restart your Mac, you might find yourself stuck at a blue screen. Don’t panic. The likely cause is an old version of Unsanity’s free Application Enhancer software. One way to fix the glitch is to reinstall Leopard using Archive & Install. Alternatively, restart your Mac in single-user mode (by holding down Command-S during start up) and delete the problematic files. (See this Apple document for detailed instructions.)
To avoid the problem before it happens, either uninstall Application Enhancer before updating to Leopard (if you don’t intend to use the software anymore) or make sure you are using version 2.0.3 or later. Even with the newest version, software that requires Application Enhancer, such as the $10 WindowShade, will not work. But at least the program will do no harm while you wait for a Leopard-compatible update.
Login Letdowns If you can’t log in to your account after updating to Leopard, it’s likely that you have a password with more than eight characters—one that you originally created when using OS X 10.2.8 or earlier. If that’s your only account, you’re going to have to restart in single user-mode and follow the instructions in this Apple document. However, if you have at least one account that you can log into, the easier fix is to install Login & Keychain Update 1.0. Log into that account and select Apple Menu -> Software Update to download it.
MIA Administrator Account After you install Leopard, you might find that your default administrator (admin) account has become a standard account. If there are no other admin accounts on your computer, there’s no easy way to get your administrator powers back. You’ll need to restart in single-user mode (holding down the Command-S key during startup) and follow the prompts to type the commands needed to gain write access to the drive. After doing so, type
rm /var/db/.AppleSetupDone(note the space between
/var) and press return. Next, type
rebootand press return to restart your Mac.
You will arrive at the Setup Assistant screen, the screen that appears when you first set up a new Mac. From here, create a new account (using a different name than your old account). After logging in to this new account, which should be an admin account, go to the Accounts preferences pane, select your original account, and select the Allow User To Administer This Computer option. Log out and log back in to your original account. If you’d like, now you can select the new account you created here and delete it.