[FireBeyond]

I ended up buying Jettison (https://stclairsoft.com/Jettison/) to handle auto ejecting on sleep and remounting on wake (in particular, I have a PCIe SSD in my Mac Pro which macOS considers an external drive, rightly so, but still).

[mperham]

How is this not built into macOS already? It's literally "on sleep, flush and unmount".