Reformatting your iMac completely means wiping it completely, wiping out all data, installed applications and settings. While it is possible to do this, it is not typically recommended, as it is a very time-consuming process that is not easy to undo.
Before beginning, you will want to make sure that you have backed up all of your important data, such as pictures, documents, music, emails, etc. onto another device like an external hard drive or USB drive.
To reformat your iMac, you will need to open the App Store and search for “Disk Utility”. This should provide you with a free application to reformat your hard drive.
Once the Disk Utility app has been downloaded, you can launch it and then select the iMac hard drive from the list of drives. You will then want to click on the “Erase” button, which will erase all the data on the drive. After the operation is complete, you can then reinstall the operating system.
It is important to remember that this process will erase all of the existing data stored on the iMac, which includes all of the applications and files that were stored on the device. Therefore, it is very important to make sure that you have backed up all of your important data beforehand.
Reformatting your iMac is an important part of maintaining the safety and security of your device, as it will wipe out any potential malicious software and viruses that may have been installed. However, it should only be attempted in extreme cases, as it can be difficult to undo.
