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How to Use Time Machine on macOS

    • Select System Preferences from the Apple menu.

    • Click the Time Machine icon in the bottom row.

    • If you haven't already, plug in your external drive, or join to the network your NAS is connected to.

    • Click the Select Backup Disk button.

    • Select the disk you'd like to make backups to from the list.

    • External backup drives must be HFS (Mac OS X Journaled) formatted to work with Time Machine, not APFS, NTFS, etc.

    • Networked devices should appear automatically on this list. Consult your NAS' manual for assistance.

    • Check the Encrypt backups checkbox for additional data security, especially if your backup device is portable.

    • If you chose not to encrypt your backups, you can skip this step.

    • Enter an encryption password for your Time Machine backups here, or let Apple generate one for you.

    • Store this password in a safe place! If you lose it, you will not be able to access any of your backup data or recover your machine.

    • If you selected a network backup location, you may be asked to enter network login credentials at this point. Consult your NAS' documentation for more information.

    • Check the Back up automatically box if it isn't checked already, and Time Machine will be enabled!

    • To begin your first backup immediately, right click your backup drive and select Back Up to "Drive Name" Now.

    • Time Machine supports multiple backup destinations for backup redundancy, if you have a second external drive or NAS.

    • Select Select Disk to select another drive.

    • Repeat steps 2 and 3 to select another backup disk from the list, and optionally enable encryption.

    • When asked if you want to replace the current backup disk or use both, select the Use Both option. This will enable backups to both drives concurrently.

    • To add three or more backup destinations, select the Add or Remove Backup Disk option. You may need to scroll through the list of backup drives to find it.

    • With multiple drives, Time Machine will make hourly backups as normal, backing up to the drive with the oldest backup first, so all drives remain as up-to-date as possible.

    • If a second backup drive isn't connected, Time Machine will continue backing up to connected drives, and will automatically update the backup when the drive is reconnected, perfect for off-site or long-term backups!

    • Now that you have Time Machine configured, macOS has a built-in backup browser to recover accidentally deleted or modified files.

    • In the folder that contained the files you want to recover, click the Time Machine icon in your menu bar, and select Enter Time Machine.

    • On the right side of your screen, there will be a timeline of backup dates you can scroll through. Select the date you want to recover from.

    • Click the file you want to restore, and select Restore.

    • Time Machine also has full system restore functionality, in case of hard drive failure. You can also use this method to setup a new machine from a previously created backup.

    • Boot to macOS recovery by holding Command+R.

    • Select Restore from Time Machine Backup from the list of available options.

    • Continue to the Restore Your System page.

    • Select your Time Machine backup from the list, and Continue.

    • Select the most recent backup of your drive, or the backup you need to restore, and Continue.

    • Your Mac will now restore the system from the backup you selected, and will restart upon completion.

    • Time Machine backups can also be used as a data source in the built-in Migration Assistant app.

    • Open the Migration Assistant app if you've already setup macOS.

    • Select the From a Mac, Time Machine backup, or startup disk option in the list of transfer choices, and click Continue.

    • Select the backup drive icon in the list of choices, and click Continue.

    • If you backed up to a NAS and don't see it in the list, ensure you're connected to the same network.

    • You may be asked to enter a decryption password. Enter the one you chose previously, when configuring your backup.

    • Choose the backup you want to use, likely the latest backup, and click Continue.

    • Select the information you want to transfer.

    • If you have a lot of content backed up, it may take several hours to restore entirely.

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That's it! Now you should know how to keep your data backed up using Time Machine, understand its more advanced features, and know how to restore a backup in the event of a failure.

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