

Then migrate the applications by selecting Copy on the External Backup/Applications folder on the backup disk then Paste on the startup disk (eg: Macintosh HD). but for this tutorial, well use the Disks utility for Linux and Etcher for macOS/Windows. This migrates all of your personal data and settings to your new home folder. Create and use bootable media to install or repair your OS. Go to the backup disk and use Duplicate (free) or Mac Backup Guru to right-click and select Copy on the home folder (eg: External Backup/Users/Bob) and then Paste on the Macintosh HD/Users folder on the startup disk.

Two options are to use Duplicate (a free utility which can copy and paste an entire bootable volume), or Mac Backup Guru (a paid, fully featured backup utility with unique incremental backups capability) for that. Select your flash drive from the drop-down menu.

Open Disc Creator and click the Select the OS X Installer button.
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However, it has been shown in recent times that in the vast majority of cases if you simply run a clean install, then duplicate your old home folder to your new disk, you will get all of the same advantages as a clean install followed by manual migration, with a small fraction of the effort. It used to be common practice to occasionally run a clean install, and then manually migrate all the files and settings over in order to get a completely fresh start. That will make your Mac run blazingly fast for a few months or more, and many people report that it fixes longstanding problems they’ve had too. When you install a new major version of OS X, or after some time has passed, it is a good idea to do a clean install (that is, to erase the disk you are installing OS X onto as part of the installation process).
