Run Software Update to make sure your Mac is fully up to date. When Snow Leopard has been installed successfully, manually copy your files across from your backup diskġ0. Quit Disk Utility to return to the installer screen and continue with the Snow Leopard installationĩ. Go to the Erase tab and make sure Mac OS Extended (Journaled) is selected and then Erase to delete everything on the disk Erase all data on the partitionĨ. In the drop-down menu labelled Partition Layout, choose 1 Partition and hit Applyħ. In the sidebar find the drive that contains Lion, select it and click on the Partition tab Set the partition in Disk UtilityĦ.

When the installer opens, don’t proceed with the installation but go to the Utilities menu and select Disk Utilityĥ. Choose Mac OS X Install DVD when the list of options is displayedĤ. Insert the Snow Leopard installation disk, restart you computer and hold down the OPTION key when you hear the boot chimeģ. You will need to copy them back onto your Mac manually later on.Ģ. If they’re not stored in the default folders, remember to find them and include them in the backup. This is necessary to keep all your documents, music, videos and such. Backup all your documents and files to an external hard drive. Note this method also removes the system restoration partition created by Lion.ġ. the one that came with your computer) and an external hard drive in order to backup your important files. You will need a Snow Leopard installation disk (e.g.

This default new installation will delete everything on your hard disk and install a fresh copy of Snow Leopard, so it’s important to backup your user files before you begin. This method is a good way to totally reset your Mac and clear out any old files and applications that might be slowing your computer down.

How to back up macbook pro snow leopard