system preference panes wont open
System preference panes won't open.
Getting a random email address for icloud access. Havent used this email for 5 years. Can't find anywhere to delete it.
MacBook, OS X El Capitan (10.11.1)
Reinstall El Capitan Without Erasing Drive
Please be sure you back up.
- Restart the computer. Immediately after the chime hold down the Command and R keys until the Utility Menu appears.
- Select Disk Utility and click on the Continue button.
- Select the indented (usually, Macintosh HD) volume entry from the the side list.
- Click on the First Aid icon in the toolbar. Wait until the Done button activates, then click on it.
- Quit Disk Utility and return to the Utility Menu.
- Select Reinstall OS X and click on the Continue button.
Also, see this User Tip: Basic Steps for Upgrading OS X.