Introduction
After you’ve replaced or upgraded the SSD or hard drive in your Mac, and you’ve successfully installed macOS to the new drive, you’ll need to transfer any data you want from the old drive to the new one. This guide will show you how to use Migration Assistant to restore data from an old macOS drive or a Time Machine Backup to your new drive.
What you need
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Before you begin, connect your old macOS drive or a Time Machine backup drive to your computer.
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After you are logged out and taken to the Migration Assistant screen, select the first option: transfer From a Mac, Time Machine backup, or startup disk.
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Click Continue.
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Migration Assistant will list any connected macOS or Time Machine drives across the top of the window.
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Select the drive you want to restore from, and click Continue.
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Once you begin the transfer, a loading bar will appear and cycle through each of the data categories that you selected on the previous screen (applications, documents, etc.).
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When the transfer is complete, the Migration Complete window will appear.
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