If you are installing mac os on a fresh Hard Drive then rather pressing cmd + R on startup, you need to press and hold only alt/opt key on system startup. In Recovery Mode you have to format your Disk using Disk Utility and Choose OS X Extended (Journaled) as drive format before you click Reinstall OS X.
Look just below the OS X version number in the Overview tab – if the Mac model name is the same or a later model year than the one shown in the compatibility list above, your Mac is compatible Reinstall Mac OS - How to Reinstall Mac OS like macOS May 23, 2019 How to Do a Clean Install of OS X Mavericks Oct 23, 2013
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Jun 01, 2020 · Reinstall from macOS Recovery. 1. Start up from macOS Recovery. To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of 2. Decide whether to erase (format) your disk. 3. Install macOS. Dec 26, 2017 · How to Wipe Your Mac and Reinstall macOS from Scratch Step One: Boot From Recovery Mode, or an Installer RELATED: 8 Mac System Features You Can Access in Recovery Mode Your Step Two: Securely Wipe Your Hard Drive (Optional) Apr 10, 2020 · Preliminary Steps for a Clean Install on a Mac Startup Drive Follow the instructions for how to make a bootable flash installer of OS X or macOS. This will make the bootable flash drive you need. Connect the bootable flash drive containing the macOS Sierra installer to your Mac. Step 4: Reinstall Mac OS X without Losing Data When you get the macOS Utilities window on the screen, you can just click on the “Reinstall macOS” option to proceed. Afterward, you simply need to follow this basic drill to reinstall macOS on your system.
How to Perform a Clean Installation of macOS Sierra
Installing macOS Mojave and Older Versions of MacOS/OS X Whether you need to download and clean install High Sierra, Sierra, El Capitan, Yosemite, or an earlier version of OS X, this guide got you covered. We’ll start by showing you how to clean install macOS Mojave, the latest version of macOS, before moving on the more complicated business of installing an earlier version of macOS or OS X. Should you do a "clean install" of Lion? | Macworld Some Mac users prefer to do a "clean install" of each major new version of OS X, erasing their drive and starting over. We examine whether or not that's possible or, more important, advisable with Apple Mac OS X 10.11 El Capitan Recovery Repair Reinstall This DVD can be used to install a clean copy of Apple Mac OS 10.11 El Capitan or to update your existing system to OS 10.11 El Capitan Installing, Recovering or upgrading your software from a DVD is NOT a quick process and can take 30-45 minutes to complete. Please be patient and allow the process plenty of …