Filed under: Accessories, Hardware, Hacks, How-tos, Terminal Tips
Mac 301: Time Machine backups after your Mac's brain surgery
As I've discovered recently, one of the unfortunate side effects of having the logic board on your computer replaced (aside from the potentially hefty bill involved if your AppleCare has lapsed) is that your Time Machine backups won't play nicely with your Mac after the repair if you're using a Time Capsule. Replacing the logic board is essentially like getting a whole new Mac; though all the data on the hard drive is identical, the new logic board will have different hardware identifiers (specifically, the MAC address) that will tell your Time Capsule, "This is a new Mac that's never been backed up before. Please treat it as such." The Time Capsule, doing as it's told, will fumble along and create a new Time Machine backup while ignoring the old backups completely.
Your options then are these:
1. Scrap your old Time Machine backups and start fresh. There may be an allure to this, but it's almost certainly unnecessary, and you can lose months of perfectly good backups. Plus, you then have to deal with the incredibly long first Time Machine backup all over again.
2. Hack your Time Machine backup using the following procedure, which will allow you to resume Time Machine backups as though your logic board was never replaced.
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