For various reasons, applications originally installed by the Mac OS X Installer disc (DVD or CD) -- Mail.app, Activity Viewer, etc. -- can become unusable. This can occur due to user deletion, ...

If you have a Mac capable of running Classic (i.e., not an Intel-based Mac) but either reformatted the drive and installed only Mac OS X, or acquired the machine with only Mac OS X installed, you may ...

Apple's latest desktop operating system, OS X 10.9 Mavericks will be available for free from the Mac App Store; below is our guide on how to make sure your Mac is compatible with Mavericks, and how to ...