Disk Utility is Apple's go-to macOS app for finding and repairing common disk errors, but if it's your Mac's internal disk that's the problem, then your Mac might not even start up into macOS.

Mac OS X 10.3.7 may not properly boot when it is installed on a drive that is secondary at the time of installation. In other words, for some users, when Mac OS X 10.3.7 is installed to a volume other ...

Repairing startup disk while booted from Tiger DVD (or other Mac OS X volume) can resolve issues We previously reported that a number of issues caused by Security Update 2005-007 v.1.1 can be avoided ...

Over 200GB had disappeared from my Mac’s startup volume. It seemed unlikely the external SSD I had just swapped in as my startup drive was shrinking. Instead, it was a snapshot—more accurately, a ...

Today’s Mac Gem is a simple one, but it’s sure to be useful to developers, frequent users of Boot Camp, and anyone else who regularly boots their Mac from different startup volumes. A few years back, ...

If your Mac is having problems, macOS has multiple keyboard combinations that you can hold to recover your system, start in safe mode, run diagnostics, and more. Here's how to use them. Apple's macOS ...