This is my first time ever dealing with a Mac OS X reinstallation. About a week ago, while working online, my MacBook Pro just started to be very very slow to do anything. I would get the WHEEL spinning for over a minute for each click on anything. I looked for trouble shooting info and followed the …

Apr 11, 2013 · If you plan to install Snow Leopard (Mac OS X 10.6), or any previous system, insert the appropriate Mac OS X install disc and restart the computer. Hold down the ‘c’ key as soon as you hear the chime, then let go when you see the Apple logo. The system should eventually boot into the installer, where you first must choose a language. Oct 09, 2016 · Select Reinstall Mac (or Reinstall OS X) and click Continue and follow the instructions. Before this, my Mac had macOS Sierra installed. So this process will reinstall macOS Sierra. Jun 11, 2019 · If your Mac is missing a Recovery partition, then you may be able to restore it, by resetting your PRAM. To reset the PRAM, restart your Mac while holding down the ‘Command+Option+P+R’ keys until you hear macOS’ distinctive startup chimes for a second time. The OS X Utilities window appears. Select Reinstall OS X, and click Continue. The OS X Yosemite splash screen appears. Click Continue. A sheet appears informing you that your computer’s eligibility needs to be verified by Apple. Click Continue to begin the process of installing or reinstalling OS X. Start up your Mac from a shut down state or restart it, then immediately hold down Command-R. The Mac should recognize that there’s no macOS Recovery partition installed, show a spinning globe.

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Sep 13, 2015 Will not reinstall OS X Lion | MacRumors Forums Feb 07, 2014

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Install OS X. There are two ways you can install OS X on to your external hard disk: by reinstalling OS X from the OS X Utilities repair screen or by downloading OS X from the App Store and running the installer. I’ll show you both methods in case one isn’t working for you. The easiest way is to download OS X … Make Your Mac Feel Like New Again With a Fresh Install of OS X 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 MacOSX Lion - Reinstall Your OS Without Installation Disc Apr 21, 2020