Step 2: Erase the hard drive

Read More. However, cloud backups almost always require a paid subscription. If you only have a small amount of files, you might look at syncing your most important files to Google Drive or other cloud storage. Another alternative is copying your vital folders to a USB flash drive. Whatever you choose to do, remember that this process will erase everything on your Mac. Before you proceed, you should also take the time to log out apps on your computer. Services like Adobe Creative Cloud limit the amount of installations you can use, so you should sign out to avoid wasting one on a non-existent system.

Choose your account on the left sidebar and choose Sign Out. This will work on any Mac running OS X Shut down your Mac.

Restore Lion to factory/wipe all data | MacRumors Forums

Continue holding these keys until you see the Apple logo. This runs the recovery environment from the internet instead of a partition on your hard drive. Then wait a bit while your computer downloads the recovery environment. When using internet Recovery mode, the system may reinstall a different version of macOS than you were using. Mine installed Mavericks, even though I was running Lion to start with.

To do this, select Disk Utility from the menu. Next, select your internal hard drive usually labeled Macintosh HD from the left sidebar. Switch to the Erase tab on the right side. The default name of Macintosh HD is fine, unless you prefer something else.

How to Create a Bootable Mac OS X Lion Installation USB Drive

Click Erase and confirm the operation. You may see a prompt to enter your Apple ID as part of this process. Accept the license agreement, then click your hard drive to select it for installation. Click Install to start the process. Once you see the Welcome screen, your Mac is back to factory defaults.

Next, confirm your keyboard layout and hit Continue again.

How to Upgrade Mac to macOS High Sierra

Here you can select From a Mac, Time Machine backup, or startup disk to import the data you backed up earlier. I have bought the I downloaded it and when tried installing it, it failed because there was no Apple-formatted disk. So I guess I have to reformat the whole drive. I have backed up all my data I don't have enough hard drive space to make a Time Machine backup. I have just saved necessary files and also the installer for OS X You don't need any external drive. You can erase the drive and reinstall OS X using the recovery system :. Some older Macs support a recovery partition but not Internet Recovery mode.


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If you have one of those Macs, you erase the whole drive from the recovery partition, and it is not in fact possible to reinstall OS X without starting up in Internet Recovery mode after that, you can probably use Recovery Disk Assistant instead. If others search for how to do a normal erase and reinstall, erase the main OS X partition like Macintosh HD instead of the whole drive:.

If your machine is still useable and can boot to mac OS, you can create a bootable usb drive out of the image using the links from below and then proceed with the install from the drive. In case you can't boot to Mac you can still take help from a friend who has a Mac with the procedure.

If you have messed with the partitions you will probably have to erase the drive and recreate the partitions.

Step 1: Boot Into Recovery Mode

Do backup before doing this. This tool can make it really easy to create a bootable usb drive out of the installer. Sign up to join this community.


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