Data Recovery Case File · Mac & Apple Ecosystem · Programs Don't Travel

Transfer Data From an Old Mac Hard Drive: What Moves and What Doesn't

His enquiry asked for something reasonable that cannot be done, and the honest answer is more useful than the sale would have been. "I have recently replaced the hard drive of my MacBook Pro and so now no longer have Word, Excel and PowerPoint on my machine. I still have my old hard drive and it works. Can you transfer these programmes onto my new hard drive?" The short answer is no — and not because it is difficult, but because installed applications are not files that can be moved. The longer answer is the useful one: what he has lost is free to replace and takes an afternoon, what he might be about to lose is not replaceable at all, and the two are sitting on the same drive. This page explains the difference, because it is the thing nobody tells you when you have a drive swapped.

The decode: why programs don't travel, and what actually should

What an installed application really is: it looks like a single icon, but installing software scatters components across the system — the application bundle itself, plus supporting frameworks, preference files, licence records and system registrations that live outside it. Copying the visible part to another drive produces something that either refuses to launch or launches and then fails on its licence check, because the parts that authorised it never came. That is true of office software in particular, where the entitlement is tied to an account or a licence key rather than to any file. So a "transfer" is not a partial success here; it is a reliable failure.

The good news he did not know he had: the correct route costs nothing at a bench. Office software of this kind is redownloaded and reinstalled from the supplier, then signed into with the account that already holds his licence — and he is back where he was. If the licence came with a one-off purchase, the key or the purchase record is what matters, not the old installation. If it was a subscription, signing in restores it completely. This is genuinely a job for an afternoon and a broadband connection, not a laboratory, and telling him so is the whole point of the enquiry being answered honestly.

What is actually at risk, and why it matters more: here is the part worth his attention. Applications are replaceable; the things sitting beside them on that old drive are not. A drive that has been pulled from a MacBook and set aside typically still holds the entire user account: documents, the desktop, downloads, the photo library, mail archives and their attachments, browser bookmarks, and anything saved to folders the new machine has never seen. It is very common for someone to have a drive swap done, discover an application missing, deal with that, and only realise months later that a folder of documents never came across — by which time the old drive has been wiped, sold or lost. So the useful version of his question is not "can you move my programs" but "has everything that matters actually come off this drive?" — and that is a question worth answering while the drive still works.

What migration properly looks like: the old drive is read without writing to it, the user account's real contents located — including the folders that live outside the obvious ones — and everything verified by opening rather than counted. Documents, libraries and mail come across to the new system; applications are reinstalled from source. Then, and only then, the old drive is safe to repurpose. Much of that he can do himself with an external enclosure, and he was told so.

On the bench

The old drive was read write-blocked — no changes made to a working disk that might still be needed — and its user account was walked properly rather than skimmed: documents and desktop, the photo library and its originals, mail stores and attachments, and the folders outside the standard set that a casual drag-and-drop always misses. Everything was migrated to the new system and verified by opening: documents launched, images rendered, mail stores loaded. The office applications were reinstalled from the supplier and signed in with his existing licence, which restored them exactly. The old drive went back to him intact and unmodified, with a written note of what had been transferred and confirmation that it was now safe to wipe or keep as a spare.

The outcome

Applications reinstalled rather than transferred, at no cost to him, and the far more valuable contents of the old drive migrated and verified before it could be repurposed. Free assessment, one fixed written figure including VAT; where a drive has to be opened or a chip removed, 50% of parts and labour is payable upfront with the balance only on success — otherwise no recovery, no fee. The distinction, posted for everyone who has just had a drive replaced: installed applications cannot be copied between systems because their licences and supporting components do not travel — reinstall and sign in instead, and it costs nothing; but the user data on the old drive is irreplaceable and is very often left behind in the confusion. Check that before the old drive goes anywhere.

Our case files are drawn from genuine enquiries received by our laboratory over the past ten years, anonymised to protect client confidentiality. Each one describes the diagnostic and recovery procedure our engineers apply to that fault, using the equipment listed.