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.

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 ...

-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 ...

In other words, you don’t need a disc to install the operating system. That way if your hard drive fails or you install a new hard drive, you can use the new Internet Recovery option. It will ...

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 ...

Thomas Koons received what we hope is the "final answer" on the question as to why Apple recommends erasing your drive if you want to reinstall Mac OS X 10.1 after installing the Security Update ...

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 ...

The option allows you to erase all user data and user-installed apps from your Mac without needing to reinstall the macOS operating system, making it far easier to restore a Mac to like-new ...