Howto

tmutil is broken by SIP in Mojave

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A diskutil bug unceremoniously erased an entire hard drive of mine a few weeks back.  While I was able to successfully (AFAICT) restore the drive’s contents to it from various backups, the erasure gave the drive a new identity (UUID, specifically).  The next time Time Machine ran, it compounded the diskutil bug by also unceremoniously… Read more

Creating a Fusion Drive from an existing disk, without erasing it

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Photo of Phil Schiller on stage presenting Apple's Fusion Drive technology, at Apple's iPad Mini event on October 23rd, 2012.

Note: this guide was written circa macOS 10.13 High Sierra, in 2018. Its accuracy has not been verified for newer macOS releases. Curiously there’s very little information out on the web (at time of writing) on how to create (or expand) a Fusion Drive without erasing its contents first.  It’s entirely possible to do so… Read more