Afterward you simply need to follow this basic drill to reinstall macOS on your system. Once the Mac is connected to the internet from the OS X Utilities screen choose Reinstall OS X Select the target hard drive to re-install OS X onto typically Macintosh HD but varies per user if the Mac has a FileVault password set choose to Unlock and enter the FileVault encryption password before proceeding further.

How To Reinstall Os X Lion 4 Steps With Pictures Wikihow

With your information wipe complete you are now ready to reinstall macOS.

Reinstall mac os x. When complete it should reinstall macOS Recovery and reinstall macOS on the main partition. A confirmation message will appear informing you about the reinstallation details. Reinstall Mac OS X without Losing Data.

Press and hold Shift-Option-Command-R. Double-click the Install Mac OS X icon and then click Restart. Follow these guidelines during installation.

Insert the installation DVD into your computer and wait for it to appear on your desktop. Reinstall the version of macOS stored on your computers built-in recovery disk. Follow these steps to reinstall the latest version of macOS installed on your Mac.

Once your Mac has booted try re-running the diskutil list Terminal command to see whether this has resolved the issue. Restart your Mac and then hold down R to activate Recovery Mode. In the Recovery app window select Reinstall macOS then click Continue.

If you once had purchased an old version of Mac OS X from the App Store open it and go to the Purchased tab. If you booted from a functioning recovery partition click the Reinstall macOS button. Agree to the Terms Conditions.

Select the hard drive youd like to reinstall mac OS Catalina to and click Install. After a short delay your Mac will display the OS X Startup Manager which will display all of your bootable devices. The installation process will begin.

When you get the macOS utility window on the screen you can just click on the Reinstall macOS option to proceed. Click the Reinstall OS X option in the menu and proceed to follow the directions. In the first window select Reinstall macOS Continue.

You will need to be connected to the Internet so make sure youre plugged in via Ethernet or are connected to a Wi-Fi network. Select Reinstall macOS from the utilities window in macOS Recovery then click Continue and follow the installers instructions. Allow installation to complete without putting your Mac to sleep or closing its lid.

Press and hold Command-R. Reinstall your computers original version of macOS including available updates. Follow the onscreen instructions.

With the release of the OS X Lion operating system for Mac computers Apple ceased traditional distribution of physical retail discs and instead offered the OS as a download via the Mac App Store. All modern Mac computers contain two separate methods to reinstall the operating system by reinstall we mean installation of a fresh OS X version. How to erase all data on a Mac how to factory reset a Mac and how to reinstall macOS.

Age of your Mac If youre using a Mac thats still running OS X Snow Leopard or older operating system then your version doesnt have Recovery Mode. How to download older Mac OS X versions via the App Store. 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.

This should include the bootable USB flash drive you just created. The correct way to reinstall macOS Catalina is to use your Macs Recovery Mode. Existing Intel Mac users may already be aware of booting into Recovery on an Intel Mac but Apple has changed the steps needed to enter recovery mode on the new M1 Apple Silicon Macs and thus reinstalling macOS is a bit different too.

As long as you have an active Internet connection you can reinstall macOS via Internet Recovery instead. This feature was introduced with the release of OS X Lion in 2011 to allow users to diagnose hardware features and troubleshoot common Mac problems on startup. If your computer can boot into OS X you can start the installation process from within the operating system.

If your Mac is really old - as in so old its running Mac OS X Snow Leopard or older - it will not have a Recovery partition the only way to reinstall the OS is to use the discs that shipped with. How to Reinstall OS X Lion. When built-in tools or software-based solutions do not work the last and most efficient solution is to reinstall the operating system.

This works for any Mac Including Macbook Macbook Air MacBook Pro I. Enter Recovery either by pressing CommandR on an Intel Mac or by pressing and holding the power button on a M1. Use your Macs arrow keys to select the OS X El Capitan installer on the USB flash drive then press Enter or Return on your keyboard.

Even if you cant repair your Macs recovery partition dont panic. At this point the Mac should start to download the recovery files from the internet and show a status bar. If you booted from an USB disk click Continue to advance to the installer.

Installing macOS via Internet Recovery. Plus there are undoubtedly new users whove switched to the platform from Windows who are less familiar.