how long does it take to transfer data from an old iMac to a new iMac?
how long does it take to transfer data from an old iMac to a new iMac over a network?
iMac 21.5″, macOS 12.5
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Never EVER use Wi-Fi to migrate data. If you use the process in Setup Assistant and Migration Assistant expect the migration to be about 2-3 hours depending on the amount of data you have. Also, ensure the new Mac has at least the same amount of storage as the old Mac.