How do I completely reinstall Mac OS X?
Enter Recovery (either by pressing Command+R on an Intel Mac or by pressing and holding the power button on a M1 Mac) A macOS Utilities window will open, on which you will see the options to Restore From Time Machine Backup, Reinstall macOS [version], Safari (or Get Help Online in older versions) and Disk Utility.
How do I reinstall Mac OS X without disc?
Reinstall Your Mac’s OS Without an Installation Disc
- Turn your Mac on, while holding the CMD + R keys down.
- Select “Disk Utility” and click on Continue.
- Select the startup disk and go to the Erase Tab.
- Select the Mac OS Extended (Journaled), give a name to your disk and click on Erase.
- Disk Utility > Quit Disk Utility.
How do I reinstall OS X after deleting a disk?
How to Reinstall Mac OS Using Recovery Mode
- Restart your Mac. …
- As your computer is restarting, hold down the Command + R keys. …
- When you are in recovery mode, click Reinstall macOS and then click continue.
- When the installer window pops up, click Continue.
Will I lose everything on my Mac if I reinstall a new copy of OS X?
2 Answers. Reinstalling macOS from the recovery menu does not erase your data. … To gain access to the disk depends on what model Mac you have. An older Macbook or Macbook Pro likely has a hard drive that is removable, allowing you to connect it externally using an enclosure or cable.
How do I restore my Macintosh HD?
Restore a disk using Disk Utility on Mac
- In the Disk Utility app on your Mac, choose View > Show All Devices. …
- In the sidebar, select the volume you want to restore, then click the Restore button . …
- Click the Restore pop-up menu, then choose the volume you want to copy.
- Click Restore, then click Done.
How do you factory reset a Mac computer?
To reset your Mac, first restart your computer. Then press and hold Command + R until you see the Apple logo. Next, go to Disk Utility > View > View all devices, and choose the top drive. Next, click Erase, fill out the required details, and hit Erase again.
How do I reinstall OSX without Internet?
Installing a fresh copy of macOS via Recovery Mode
- Restart your Mac while holding down the ‘Command+R’ buttons.
- Release these buttons as soon as you see the Apple logo. Your Mac should now boot into Recovery Mode.
- Select ‘Reinstall macOS,’ and then click ‘Continue. ‘
- If prompted, enter your Apple ID.
How do I reinstall Mac OS without recovery mode?
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. You should then be prompted to connect to a Wi-Fi network, and you enter a password.
How do I fix a Mac installation error?
How to Fix the ‘macOS Could Not Be Installed’ Error
- Restart and try the installation again. …
- Check the Date & Time setting. …
- Free up space. …
- Delete the installer. …
- Reset the NVRAM. …
- Restore from a backup. …
- Run Disk First Aid.
How do I reinstall Mac OS from USB?
Simply plug your created USB drive into an open USB port on your Mac. Power on the system, or restart it if it’s already on. Immediately press and hold the Option (Alt) key on your keyboard when it starts booting. You should now see an option to select your USB drive as a startup disk.
How do I install OSX on new hard drive from USB?
Insert the flash drive in a USB port on your Mac. Start the Mac and hold down the option key. Select to boot from the flash drive. Use the Disk Utility application to create a single partition to install El Capitan (OS X 10.11).
How do I install OSX on a new hard drive?
Download the relevant macOS or OS X installer from Apple, then use Terminal to create a USB installer you can boot up from. Or use the OS X installation disc that came with your machine — or buy a new one — to boot up and install OS X on your Mac’s hard drive.