If you have a large iTunes library, you may have reached the point where you need to offload some of your media files to another drive.
Pam Bush upgraded her Mac to the latest version of OS X, but her Photos library is full of black thumbnails, rather than tiny images.
Safe mode (sometimes called safe boot) is a way to start up your Mac so that it performs certain checks and prevents some software from automatically loading or opening. Starting your Mac in safe mode does the following:
If your Mac has a built-in optical drive, or if you connect an external DVD drive you can burn files to CDs and DVDs