Step-by-step tutorial to erase, format an SD card on your Mac computer.
Learn how to reinstall macOS or Mac OS X from macOS Recovery mode. You can choose clean install or reinstall macOS without losing data when your Mac is crashed.
Tutorial to boot Mac to target disk mode and use it. Target disk mode enables file transferring and data recovery from Mac internal hard drive that won’t boot.
Four solutions to recover data from Mac that won't turn on. You can back up or get files off MacBook Pro, MacBook Air, and iMac that won't boot.
Run Mac's First Aid in Disk Utility or from macOS Recovery mode to repair Macintosh HD, startup disk and external hard drive when it's corrupted, unreadable, unmounted.