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. Check to see if you can install a new hard drive to your Mac. Macs are notoriously difficult to upgrade. Purchase an SSD enclosure. In order to transfer your MacOS to a new SSD, you will need to an external enclosure. Back up your old hard drive. Before doing any repairs. Connect the SSD to the Mac Mini via USB (e.g. Using an SATA to USB3.0 adapter) The new SSD must now be formatted for the first time using the hard disk utility (as'Mac OS Extended Journaled') Then Carbon Copy Cloner or SuperDuper! Can be used to create a fully bootable 1:1 copy of the hard disk on the SSD (this process can take several hours).
Prepare your drive
You can store your library on an external storage device, such as a USB or Thunderbolt drive formatted as APFS or Mac OS Extended (Journaled). However, you can't move your library to a disk that's used for Time Machine backups. Find out how to check the format of your external storage device.
To prevent data loss, Apple doesn't recommend storing photo libraries on external storage devices like SD cards and USB flash drives, or drives that are shared on a network.
Move your Photos library to an external storage device
- Quit Photos.
- In the Finder, go to the external drive where you want to store your library.
- In another Finder window, find your library. The default location is Users > [username] > Pictures, and it's named Photos Library.
- Drag your library to its new location on the external drive. If you see an error, select your external drive's icon in the Finder, then choose File > Get Info. If the information under Sharing & Permissions isn't visible, click the triangle button , then make sure the 'Ignore ownership on this volume' checkbox is selected. If it's not selected, click the lock button to unlock it, enter an administrator name and password, then select the checkbox.*
- After the move is finished, double-click Photos Library in its new location to open it.
- If you use iCloud Photo Library, designate this library as the System Photo Library.
Delete original library to save space
After you open your library from its new location and make sure that it works as expected, you can delete the library from its original location.
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Mac update to catalina. In a Finder window, go back to your Pictures folder (or whichever folder you copied your library from) and move Photos Library to the trash. Then choose Finder > Empty Trash to delete the library and reclaim disk space.
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Open another Photos library
If you have multiple libraries, here's how to open a different one:
- Quit Photos.
- Press and hold the Option key while you open Photos.
- Select the library that you want to open, then click Choose Library.
If you have multiple libraries, here's how to open a different one:
- Quit Photos.
- Press and hold the Option key while you open Photos.
- Select the library that you want to open, then click Choose Library.
Photos uses this library until you open a different one.
Learn more
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If you have a permissions issue with your library, you might be able to resolve the issue by using the Photos library repair tool.
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* If the volume isn't formatted APFS or Mac OS Extended (Journaled), or has been used for Time Machine backups but hasn't been erased, this checkbox will either not be present, or won't be selectable after unlocking. Erase and reformat the drive for this option to be available.
