
the razer product is a deathadder chroma mouse. I'm on a 27" retina imac with 2 external displays and i normally use 2 spaces with my main screen.
#Razer synapse for mac os sierra update
So either the update or the full computer restart (rather than just going back to login screen) helped. Then I saw there was a new synapse update, got it, restarted, and I've stopped crashing for now. It takes a while to load when I start up, and I'd switch spaces a bunch successfully, see synapse it load, then switch again and crash to login screen immediately. After some testing I believe the culprit is RAZER SYNAPSE. I found I could switch Spaces a bunch before everything started up. Except while apps were loading at startup. Originally it was intermittent but it became consistent. I've been having the bug where switching Spaces would crash me to the login screen. TL DR the crash-to-login when switching Spaces problem may be caused by RAZER SYNAPSE. If it works, you've isolated the problem to some idiosyncracy in your account. BTW, you may want to create a "test" account and try going to full-screen mode with an app, and navigating spaces.

If (when) I get a resolution from Apple, I will post here. If you have the same problem, we may have the same issue. You may want to try the Desktop Spaces movement on your computer. Apple thinks it's something that's loading during my unique login and we're working on isolating the problem.

I created a "test" account and everything works fine. Of note, this is only affecting my account. Interestingly, if I navigate Desktop Spaces manually, usuing Mission Control, I'm successful in switching. I think the unifying thing here is the automatic switching to a different Desktop Space, including for full-screen.

I also have this problem and have been working with Apple support to try to resolve it.
