Reader Kai Peterson installed a copy of Yosemite but seems to be missing something. He writes: I installed a clean copy of Yosemite on an external hard drive, which I cloned to another Mac using the ...

One of the best features introduced in Lion (OS X 10.7), and available on every version of OS X since, is OS X Recovery. The OS X installer creates an invisible, bootable, 650MB partition—a portion of ...

You know you’ve got a serious PC problem when your computer refuses to get through even the first phase of startup properly. If you can't get into Windows or macOS at all, then your troubleshooting ...