timemachine quickly encrypts

Time Machine: Encrypt backup without loss of speed

Those who use MacOS will usually also use the timemachine backup. However, if the backup is to be encrypted, there are a few tricks that can be used to avoid a slow timemachine backup.

An encrypted backup is recommended because modern Macs automatically encrypt the drives using the built-in T2 chip. If the backup were to remain unencrypted, this would pose a security risk if the backup hard disk were to be lost.

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