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.

Reinstalling OS X 10.1 after Security Update MacFixIt readers remain largely stumped as to why Apple warns against reinstalling OS X 10.1 after installing the Security Update (see yesterday's item).

Tips If you don't have Internet access or you are reinstalling from an OS X version prior to 10.7, insert the installation disc in the computer's optical drive before restarting.

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If you reinstall 10.6, you probably do need to upgrade, because the app store wasn't introduced until 10.6.7 or 10.6.8 or so. Buying ML, making a USB or SD card installer, booting from that and ...

Each version of server costs another $20. It isn't like the desktop OS versions that are provided free. Kinda sucks, huh? The App Store has v4.0, which lists compatibility as OS X 10.10 or higher.

If you’ve ever had to reinstall OS X, chances are you’ve used the Apple-provided system installer disc that came with the Mac. But what do you do if you misplace the DVD, or it becomes ...

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 ...

Reinstalling OS X -- even over an existing 10.10 install -- will trigger the installer to recreate the recovery partition. A downside is that you have to wait to reinstall OS X all over again.

When in doubt, reboot It’s true that patience is indeed a virtue. However, if the OS X Mavericks installation progress bar stays constant for an hour or two, its time to make a move. One thing ...

Apple first offered a new recovery tool as part of OS X Lion back in July 2011, and it’s available for some mid-2010 Macs too. This allows you to do a complete macOS reinstall over the Internet ...