How to erase an imac hard drive without disc?

But this has become easier since OS X Recovery was added in Lion. Restart a Mac and hold down Command-R after the startup chime sounds, and the computer boots into the recovery mode. Select Disk Utility from the startup menu, and you can erase your startup drive securely.

Considering this, how do I force my Mac to erase a hard drive?

Best answer for this question, how do you clear everything off a Mac?

Similarly, how do I restore my IMAC to factory? 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 will clear user settings from the memory and restore certain security features that may have been altered previously.

Also, can I erase Macintosh HD data? 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.The disk image itself is basically treated as a file by Finder. So, after ejecting the disk image (assuming you had it mounted), all you need to do is delete the disk image like like you would any other file. For example, right-click on the disk image and select the Move to Trash option and then empty the trash.

How do you delete a file that won’t Delete on a Mac?

Type in “rm -f ” without the quotation marks, and with the space after the f. Then find the file that wont delete, and drag it to the Terminal window, and the path to that item should appear. Double check that this is the thing you want to delete, then press enter.

How do you completely wipe a hard drive?

1. Step 1: Back up your hard-drive data.
2. Step 2: Don’t just delete files from your computer.
3. Step 3: Use a program to wipe your drive.
4. Step 4: Physically wipe your hard drive.
5. Step 5: Do a fresh installation of the operating system.

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.

How do I do a factory reset?

1. Tap Apps.
2. Tap Settings.
3. Tap Backup and reset.
4. Tap Factory data reset.
5. Tap Reset Device.
6. Tap Erase Everything.

How do I factory reset my iMac without password?

First you’ll need to turn off your iMac. Then press the power button and immediately hold down the Control and R keys until you see the Apple logo or spinning globe icon. Release the keys and shortly afterward you should see the macOS Utilities window appear.

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.

Does Mac OS reinstall delete data?

2 Answers. Reinstalling macOS from the recovery menu does not erase your data. However, if there is a corruption issue, your data may be corrupted as well, its really hard to tell. … Reinatalling the os alone does not erase data.

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 delete a disk image on a Mac?

1. Back up any important files.
2. In the Disk Utility app on your Mac, select the disk set you want to delete in the sidebar.
3. Click the Delete RAID button.
4. Click Delete.

How do I erase a disk?

1. Click the Windows “Start” button and type “partition” into the Search field.
2. Right-click on the partition you wish to delete and click “Delete volume.”
3. Click “Yes” when asked to confirm the deletion.

How do I remove disk image from Mac desktop?

Answer: A: Click on your desktop so that the “Finder” menu appears in the upper left. Then go to Finder > Preferences > General, and where it says “Show these items on the desktop,” uncheck the box for Hard disks.