10/31/2022 0 Comments Reinstall mac software os![]() ![]() Select the drive and hit the Erase button to delete all data from your system. ![]() Click on it, and the available drives will appear on the left side panel. Step 2: In the window, you will see the Erase tab. Choose the Disk Utility option and open the menu. We still have one more issue! Apple has long since stopped maintaining the installer certificates. Step 1: Restart Mac and enter Recovery Mode. If you have a Time Machine backup available, choose that. If you experience some systemic problems, you can just choose to reinstall macOS. You can then choose the appropriate course of action. If you once had purchased an old version of Mac OS X from the App Store, open it and go to the Purchased tab. Reinstall mac software os how to#How to download older Mac OS X versions via the App Store. Or, you’ll need to prep up a OS installer USB Thumb drive using another Mac system following this guide: How to make a bootable Lion install disc or drive Turn off your Mac and start it back up while holding + R The Recovery Mode Mac menu will open. If you succeed in downloading the OS installation, your next step is to create a bootable USB or DVD and then reinstall the OS on your computer. If you really need to stick with Lion you’ll need to get the original install CD and a CD player which works with your system. Use it to install the OS on your MacBook Air.īut you’ll need to worry about some of your older apps won’t run under Sierra or newer macOS’s. You need to install a newer version of OS-X (macOS) I would recommend going with Sierra (10.12.x) and stopping there.ĭownload this OS installer How to upgrade to macOS Sierra on another Mac system and follow this guide: How to create a bootable macOS Sierra installer drive. ![]()
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