Although the M1-based Macs have only two Thunderbolt ports, they each have their own bus and support the Thunderbolt 4 option that enables the use of Thunderbolt hubs.

After working through the failure of his iMac’s SSD, Adam Engst shares the lessons he learned with regard to backing up, restoring, and eking out the most life from old hardware. Hint: waiting to upgrade hardware and software can make troubleshooting and recovery more difficult.