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CLEAN INSTALL MAC OS SIERRA ON NEW SSD MAC OS X

also I’m sure there’s a ton of stuff on it I don’t need – that I’m unaware is draining my mac. I want a clean install because my mac is a little ’s a pro from 2009 – and I just feel it is time. I’ve never performed a clean install before, and am running mountain lion at this moment. I may have a few silly questions but here goes:

CLEAN INSTALL MAC OS SIERRA ON NEW SSD MAC OS X

When the Mac reboots you will have a clean installation of Mac OS X 10.8 to work with.Īt this point you can either import files and apps from the backup you made, manually copy over backed up files, or just start anew.

Choose your freshly formatted hard drive and install Mountain Lion.

When finished, quit out of Disk Utility and now select the “Install Mac OS X” option from the menu.

Click the “Erase” button and let the drive format – this is the point of no return.

Select “Disk Utility” and choose the hard drive you wish to format, click the “Erase” tab, and then pull down the “Format” menu and select “Mac OS Extended (Journaled)” as the type, name the drive if you wish.

Choose the “Mac OS X Installer” startup volume from the boot menu.

With the boot installer drive connected to the Mac, reboot and hold down the Option key.

Create a bootable install drive for OS X Mountain Lion, make one manually with a USB drive or use the LionDiskMaker tool to automate the process with a USB or DVD.

If you don’t have it yet, get Mountain Lion from the Mac App Store but do not install it yet (or redownload it if you did install it).

We’d highly recommend backing up your Mac before performing a clean install, even if you have no intention on using it afterwards. The process described below will format the selected Mac disk and erase everything on it, followed by performing a completely clean and fresh installation of OS X Mountain Lion.