I went from almost never needing to restart my mac (with Snow Leopard) to having to restart it a couple of times a week with Sierra. The UI just becomes totally unresponsive (the cursor stops moving, the time in the menu bar stops ticking and the spinning wheel stops spinning) and needs a restart. And I don't even have things like SIMBL installed (I used to with snow leopard, not anymore). I just have Karabiner eleme…
> I used to use Exposé all the time, now I don't because everything slows to a crawl when I activate it. Too true. I just tried opening Mission Control on a maxed-out MacBook Pro with Sierra and it took 7 seconds. It's a shame that Snow Leopard isn't compatible with most toolchains now.
I will say Snow Leopard was by far the peak of OS X stability (And with that, probably the best OS I have ever used) but Sierra is far from being bad or unusable for me.