How to format imac and reinstall os x?

1. Start up your computer in macOS Recovery:
2. In the Recovery app window, select Disk Utility, then click Continue.
3. In Disk Utility, select the volume you want to erase in the sidebar, then click Erase in the toolbar.

Correspondingly, how do I wipe and reset my Mac and reinstall macOS step by step?

1. Start up your computer in macOS Recovery:
2. In the Recovery app window, select Disk Utility, then click Continue.
3. In Disk Utility, select the volume you want to erase in the sidebar, then click Erase in the toolbar.

Subsequently, how do I wipe my Mac and start over? Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. Release the keys after about 20 seconds. This clears user settings from memory and restores certain security features that might have been altered.

Also, how do I reformat my IMAC and reinstall without disc?

Likewise, how do I reset my Mac operating system?

1. Hold down the Command and R keys on the keyboard and turn on the Mac.
2. Select your language and continue.
3. Choose Disk Utility and click Continue.
4. Choose your startup disk (named Macintosh HD by default) from the sidebar and click the Erase button.

How do I restore my Mac to factory settings?

1. Restart your computer: hold the power button > select Restart when it appears.
2. While the computer restarts, hold down the ‘Command’ and ‘R’ keys.
3. Once you see the Apple logo appear, release the ‘Command and R keys’
4. When you see a Recovery Mode menu, select Disk Utility.

How do I boot my Mac into recovery mode?

1. Restart your Mac.
2. Immediately hold down Command-R.
3. Release them as soon as you see the Apple logo.

How do I do a factory reset?

1. 1 Tap Settings
2. 2 Tap General Management.
3. 3 Tap Reset.
4. 4 Tap Factory data reset.
5. 5 Tap RESET.
6. 6 Tap DELETE ALL. Please be patient as phone resetting takes some time.
7. 1 Tap Apps > Settings > Backup and reset.
8. 2 Tap Factory data reset > Reset Device > Erase Everything.

What do I do if I can’t reinstall OSX?

First, completely shut down your Mac via the Apple Toolbar. Then, hold down Command, Option, P, and R buttons on your keyboard as you restart your Mac. Continue to keep these buttons held until you hear the Mac startup chime twice. After the second chime, let go of the buttons and let your Mac restart as normal.

How do I do a hard reset on a MacBook Pro?

1. To force a restart your MacBook, you need to press and hold down the Command (⌘) button, the Control (Ctrl) key, and the power button at the same time.
2. Hold these keys down until your MacBook’s screen goes blank and the computer restarts itself.

How do I factory reset my iMac g4 without CD?

How to Factory Reset an iMac Via the Recovery Partition. Restart the iMac and hold the “Command-R” keys while the computer reboots. Select and connect to a Wi-Fi network from the list if the iMac prompts you to do so. Choose the “Disk Utility” option from the list and click “Continue.”

How do I restore my 2010 iMac to factory settings?

After the iMac shuts down completely but before it begins to restart, hold down the Command (⌘) and R keys at the same time. The Mac will display the macOS Utilities menu, from which you can reinstall Mac OS.

How do you restore Internet on a Mac?

1. Shut down your Mac.
2. Hold down Command-Option/Alt-R and press the Power button.
3. Hold down those keys until you a spinning globe and the message “Starting Internet Recovery.
4. The message will be replaced with a progress bar.
5. Wait for the MacOS Utilities screen to appear.

Will a factory reset remove viruses Mac?

If your PC, Mac, iPhone or Android smartphone becomes infected by a virus, a factory reset is one way of potentially removing it. However, a factory reset should always be approached with caution. You will lose all your data. … It does remove viruses and malware, but not in 100% of cases.

How do I reset my MacBook Air to factory settings 2015?

To do this, press and hold Command+R when restarting your MacBook Air or switching it on, holding both keys until you see the Apple logo. After the Apple logo appears and it’s finished starting up, you are shown the Utilities window. It’s here that you can erase your hard disk and perform the reset.

How do I fix a Mac startup problem?

Hold down all of these keys: Command, Option (Alt), P and R, and turn on the Mac (it’s the same keys to reset the PRAM). Keep holding the keys down until you hear the Mac restart again. Listen for a second reboot, and then release the keys.