How to erase hard drive imac without disc?

Select the hard drive on which Mac OS X is installed from the tree list on the left side of the window. Open the “Erase” tab. Select “Mac OS Extended (Journaled)” from the “Format:” drop menu and enter a name for the hard drive in the “Name:” text entry field. Click “Erase…” to clear all of the hard drive‘s contents.

Also the question is, how do I force my Mac to erase a hard drive?

Frequent question, how do I restore my IMAC to factory settings without CD?

Beside above, how do I manually wipe my Mac?

1. Turn on your Mac and continue to press and hold the power button until the startup options window comes up.
2. When the Utilities window appears, select Disk Utility.
3. In the sidebar, choose Macintosh HD.
4. Click the “Erase” button, then select a file system format and enter a name for it.

Quick Answer, how do I clean up my Mac hard drive?

1. Clean up cache. You’ve probably heard “Remove your cache” as a web browser troubleshooting tip.
2. Uninstall apps you don’t use.
3. Clean out useless duplicates.
4. Empty the Trash.
5. Reduce clutter.
6. Delete large and old files.
7. Remove old iOS backups.
8. Wipe out Language files.

Use Disk Utility to erase your Mac Select Macintosh HD in the sidebar of Disk Utility. Don’t see Macintosh HD? Click the Erase button in the toolbar, then enter the requested details: Name: Macintosh HD.

How do I wipe my iMac 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.

How do I restore my 2010 iMac to factory settings?

1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu.
3. Click the Erase tab.

How do I factory reset my iMac 2020?

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 the memory and restores certain security features that may have been altered.

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.

How do I restore my Mac Air to factory settings?

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.

Does reinstalling macOS delete data?

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 remove a clean drive?

1. Step 1 Select Settings. Start your computer and head to settings.
2. Step 2 Select “Update and Security”
3. Step 3 Click on “Recovery”
4. Step 4 Click on “Remove Everything”
5. Step 5 Select the Operating System.
6. Step 6 Select the second option- Remove Files and Clean Drive.
7. Step 7 Select Reset.

How do I clean up my Mac to make it run faster?

1. Clean up system files and documents. A clean Mac is a fast Mac.
2. Detect & Kill Demanding Processes.
3. Speed up startup time: Manage startup programs.
4. Remove unused apps.
5. Run a macOS system update.
6. Upgrade your RAM.
7. Swap your HDD for an SSD.
8. Reduce Visual Effects.

Is there a disk cleanup utility for Mac?

Disk Cleanup Pro is among the free utilities in the Mac App Store, and others can be found online. As with all maintenance programs, however, read the reviews before you download and back up your Mac before using software intended to automatically delete files on your computer — just in case.

What happens if you delete Macintosh HD?

You won’t lose your own files, or apps that you might have installed. This reinstall just copies a fresh set of your operating system files. Then, restarts, finishes the install with those downloaded files. The install process might take more than 30 minutes, but you should boot back into your hard drive, no harm done.

Why do I have Macintosh HD and data?

What you have done is upset the logical volume “Macintosh HD”. For security reasons macOS Catalina splits the logical boot volume, in your case “Macintosh HD” into two physical volumes, one for all the system files and another for the use data which has ” – Data” put on the end of the name.