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How clean install OS X El Capitan?
What to Know
- Restart the Mac from the bootable installer while holding down the Option key. Select the installer on the USB drive and press Return.
- If installing to startup drive, select Disk Utility > Continue. Select the drive and choose Erase.
- Confirm Mac OS X Extended (Journaled) is selected.
How do I wipe my Mac and reinstall OS X?
Erase and reinstall macOS
- Start up your computer in macOS Recovery:
- In the Recovery app window, select Disk Utility, then click Continue.
- In Disk Utility, select the volume you want to erase in the sidebar, then click Erase in the toolbar.
What happens when I install El Capitan on my Mac?
When you install El Capitan on your current startup drive with the clean install method, you erase everything on the drive. That includes OS X, your user data, and personal files. Back up your data before you begin. After you back up your data, download El Capitan from the Mac App Store.
How do I erase OS X El Capitan?
Click on the Erase icon in Disk Utility’s main window. A panel will drop down. Set the Format type to Mac OS Extended (Journaled.) Click on the Apply button, then wait for the Done button to activate and click on it. Quit Disk Utility and return to the Utility Menu. Select Reinstall OS X and click on the Continue button.
Do you need a flash drive to install El Capitan?
While most Mac users are well served by running the normal update process to OS X El Capitan after it has been downloaded from the Mac App Store, this guide is for users who want to start fresh. You will need to have made a bootable OS X El Capitan installer drive with a USB flash key to perform a clean install.
How do you clean OS X on a Mac?
Select “Macintosh HD” (or whatever the name of the target Mac drive), then click on the “Erase” button Give the drive a name or keep it the same, and under “Format” choose “OS X Extended (Journaled)”, then click on “Erase” – THIS ERASES EVERYTHING ON THE MAC, THIS IS NOT REVERSIBLE