Mar 29, 2019 · Select “Reinstall Mac OS X “ from the Mac OS X Utilities dialog followed by the “Continue” button. 4 Select the drive or volume you want to reinstall Lion on and follow the onscreen instructions to complete the installation. Note: This option requires an internet connection in order to download the OS from the Apple servers.

Jan 11, 2019 · Restart your Mac using one of the following keyboard commands: Command+R — this will reinstall the version of the OS that was most recently installed on your Mac. Command+Option+R — this will reinstall the latest version of the OS that is compatible with your Mac. 2. May 18, 2020 · Steps to Reinstall Mac OS Using Recovery Mode. The first step on how to reinstall Mac OS in recovery mode is to once again access macOS Utilities. However, you can uninstall and reinstall Mac OS X without having to wipe your drive. Instead of running Disc Utility, you can select “Reinstall macOS” right off the bat. The instructions offered here describe both the process for installing and the process for reinstalling OS X. Here’s how to install (or reinstall) OS X, step by step: Boot from your Recovery HD partition by restarting your Mac while holding down the cmd+R keys. The OS X Utilities window appears. Select Reinstall OS X, and click Continue. Once you’ve done that, here’s how to install, reinstall, or upgrade to El Capitan, step by step: Boot from your Recovery HD partition by restarting your Mac while holding down the Command+R keys. The OS X Utilities window appears. Select Reinstall OS X, and click Continue. Jul 18, 2014 · first, you download OS X Recovery Disk Assistant v1.0 from apple, then create a recovery usb drive, then plug in the usb into your mac. when it power on, press option to select use the recovery disk you just made. you will found you can reinstall a OS x 10.10.

Sep 08, 2019 · How to erase all data on a Mac, how to factory reset a Mac, and how to reinstall macOS. This works for any Mac Including Macbook, Macbook Air, MacBook Pro, Imac, Imac Pro, Mac Pro, & Mac Mini

Quit out of the Disk Utility app, and this time choose Reinstall OS X and Continue.Follow the instructions that appear on screen, license agreements and all, and choose the hard drive to use (in This isn't really an answer right now, it's a selection of possibilities which need testing &/or confirmation they've been tried & failed. While there was still an old OS on the machine, Cmd ⌘ R should have run Recovery which would give you the opportunity to re-install the current OS, providing you could supply the Apple ID credentials initially used to 'purchase' the OS on that machine.

If you have a problem with your Mac and need to reinstal the operating system you should be able to simply reinstall macOS (or Mac OS X) via the Recovery partition.

So, choose that drive, and that’s how your macOS will get installing in your Mac. Told you reinstalling the macOS is simple and easy you just have to follow the protocol and everything happens in a smooth line. Thus now: you are able to securely uninstall and delete your data from your Mac and then reinstall the OS again. Nov 19, 2017 · This is a normally invisible part of the Mac’s hard drive. The Mac can start up from the Recovery Partition, and it can be used to erase the hard drive and then reinstall OS X onto that hard drive. Here are the steps to erase your Mac’s hard drive and then reinstall the Mac operating system onto it. Sep 19, 2018 · In the old days, you could reinstall the OS through the DVD that shipped with your Mac. But since new Macs don’t have an optical drive, we’ll use the built-in Recovery Mode to do so. This will work on any Mac running OS X 10.7 Lion or later.