There are many reasons to reinstall macOS. It fixes errors and wipes your Mac in case you want to sell it. Here's how to do it.

Reinstalling Mac OS X on a Partitioned Hard Drive. The Mac OS X Lion operating system includes a recovery utility that you can use to reinstall the operating system if necessary. If you have a ...

If you need to reinstall Mac OS X 10.1, you should back up data and erase the affected hard disk or partition prior to installation.

If you experience issues running macOS Big Sur on your M1 MacBook Air, ‌M1‌ MacBook Pro, or ‌M1‌ Mac mini, or you want to start afresh with a new installation of the operating system, you ...

Apple today released macOS 12 Monterey, and whenever a new operating system is released for the Mac, some users prefer to perform a clean installation. This article explains how to perform what is ...

-system -Powermac 5500/225OS 8.0This will boot without extensions. Without bypassng them, the OS starts to load from either the CD or from the HDD but stops before any extensions appear.I am ...

One method is detailed in our tutorial "How to reinstall Mac OS X". The other involves using Time Machine to restore to a previous version of OS X. Unfortunately in Time Machine Apple does not ...

If you ever need to restore the entire contents of an OS X Lion startup drive, or just perform a reinstall of the OS, you’ll find that there are numerous ways to accomplish these tasks. In fact ...