Oh man, #apple can't even make #guarantees about #data #integrity because they #hacked some #code around #fsync to #cheat on #performance #benchmarks https://twitter.com/marcan42/status/1494.. Even when calling #ffullsync you *still* cannot be sure the data is written to #disk ! It's a #corruption #nightmare - #forget running a #database , you can barely run *any* #program that relies on a #reliable #filesystem !