Advanced Mac tinkering: performing a drive transplant on a 9-year-old machine

Friday’s work toolkit got a little weird. It included two suction cups, multiple sizes of Torx screwdriver bits, a pair of tweezers, a can of spray air, a microfiber cloth and a lot of patience.

Were Apple a company that updated its computers on a regular and predictable pattern, I would have replaced this desktop long ago. But first it spent years neglecting its desktops, then my laptop needed replacing first, and now the “new” iMac has gone almost a year without an update.

iMac SSD in placeInstead, two other things got me to upgrade my desktop the cheap but hard way. First my backup hard drive died without warning, then I noticed that an SSD upgrade kit was down to $200 and change at the longtime aftermarket-Mac-hardware vendor Other World Computing. That would be a cheap price for a vastly faster storage system, and anyway I couldn’t resist the challenge here. So I placed my order… and then waited two weeks as the Postal Service somehow lost and then recovered the package that it only had to run from the nearest UPS to our front porch.

In the meantime, I did a complete Time Machine backup on my new external drive, then used Shirt Pocket’s SuperDuper to put a bootable copy of the iMac’s entire drive on a second partition of that external volume. With those redundant backups done and my schedule somewhat clear Friday, it was time to risk breaking my desktop computer with the sort of involved tinkering I last seriously attempted around the turn of the century, when I owned a Mac clone in which almost everything inside was user-accessible.

Step one–as explained in a how-to video that would have been more effective as written instructions illustrated with animated GIFs–was to get the iMac’s LCD out of the way. I used the suction cups to lift the outer glass off the magnets holding it in place (you can imagine my relief at not having to battle with any glue), then removed eight Torx screws holding the LCD assembly, using the tweezers to ensure they wouldn’t get lost inside the iMac. I carefully tilted that out and held it away from the rest of the computer, then detached four ribbon cables from their sockets inside the computer–each time feeling a little like I was about to fail to defuse a bomb.

The next step was to extract the old hard drive. After removing another two screws and plucking out a further three cables, I just had to undo four other screws to get the hard drive out of its mounting bracket… which is when I realized that the second screwdriver included in OWC’s kit wasn’t the right size.

iMac LCD attachmentFortunately, the second neighbor I checked with had an extensive set of Torx screwdriver bits. After finding one properly sized to liberate the drive bracket, I used the spray air to knock nine years’ worth of dust out of the innards of the computer, then completed the drive transfer by securing the SSD to the bracket, connecting it to the original cables and fastening the new drive to the computer. I did the same routine with the LCD assembly, wiped it and the glass panel with the microfiber cloth, then finally clicked that outer glass back onto its magnets.

With the computer once again whole, I plugged it in, attached the backup drive, pressed the power button–and was delighted to see it boot properly off that external drive.

Installing macOS High Sierra from the backup drive to the SSD went remarkably fast; running a complete Time Machine restore of all my data and apps did not. But by the end of Friday, I had an old computer that no longer felt so old. And the pleasant sense that I haven’t completely lost my DIY-tech skills.

Updated 10/29/2018 to fix a couple of grammatical glitches.

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