‘MacBook hard drive failure’ covers two very different machines. The older MacBooks and iMacs have a real, removable drive that fails — and recovers — like any other. The modern ones have their storage soldered to the logic board and encrypted by default, where ‘failure’ means something else entirely and what you do next decides whether the data is even reachable. Knowing which Mac is on your desk changes the whole job.
The recovery route splits on one question — is the storage a separate drive, or soldered to the board and encrypted?
Most MacBooks up to around 2015, and a great many iMacs, hold a standard 2.5-inch hard drive or a removable SSD — ordinary storage in an Apple case. It fails the ordinary way: a spinning drive that clicks or grinds after a knock or simply with age, or an SSD that drops out of the system and stops being seen. None of that is special to Apple, and it recovers by the usual routes — donor heads for a failed mechanism, controller work for a dead SSD, then a sector image and the files off the copy. If your Mac is a few years old and the drive spins, this is almost certainly where you are, and the odds are good.
From roughly 2018 — the arrival of Apple’s T2 chip — and on every Apple-silicon Mac since, the SSD is soldered to the logic board and the data is encrypted by default, with the keys held inside the chip. There is no drive to pull. If the board or its storage controller fails, recovery is board-level and delicate; and if the encryption keys are lost along with the chip, even perfectly intact flash can read back as nothing. That is why a modern MacBook that won’t boot is a fundamentally different case from an old one — and why ‘just erase and reinstall to fix it’ can be the single worst move, throwing away the only key to your own data.
A lot of iMacs and Mac minis shipped with a Fusion Drive — a small SSD and a large hard drive bonded into one logical volume, so the machine feels fast while holding a lot. The catch appears when either half fails: the whole volume can refuse to mount, and because your data is spread across both parts, both have to be imaged and the volume reconstructed before anything is readable. Treat one disk in isolation and the picture falls apart. It is the same lesson as a striped array — the pieces only mean something together.
The warning signs depend on the machine: a spinning-drive Mac that clicks, beeps or crawls; a Mac that boots to a flashing question mark or hangs at the Apple logo; Time Machine backups that start failing, or a disk flagged as failing in Disk Utility. The mistakes are consistent, though. Don’t keep restarting a failing machine hoping it catches — each attempt spends drive life or stresses a dying board. Don’t run Disk Utility’s ‘First Aid’ over and over, or reach for ‘Erase’ on a disk you still need — on a modern Mac, erasing can discard the encryption key for good. And don’t assume Time Machine has you covered until you have actually confirmed it restores.
Whichever Mac it is, the order holds. Older machines: repair the mechanism or the controller, take a full read-only image, then rebuild the files from the copy with the original left untouched. Modern soldered Macs: board-level access to the storage, working with the encryption wherever the keys survive rather than fighting it, and imaging what can be reached. The Mac recovery bench handles APFS, FileVault and Fusion volumes as part of the job — but the first move is always a copy, never a repair attempt on the only surviving data.
MacBook or iMac clicking, stuck at the Apple logo, or a Fusion Drive that won’t mount? Before you erase or reinstall anything, stop — the diagnostic is free, the quote is fixed in writing, and honest advice on 0131 202 0491 costs nothing at all.