Hello,
I found Spine 3.6.53 editor does not executed on my macs(iMac 5k, Macbook Pro) installed lastest OS Big Sur.
I tried to uninstall Spine and re-install and found new launcher executed first. I could select Spine editor version so I choosed 3.6.53. After that, Spine opened with 100% scale UIs so it seems too small in my iMac 5k.
It seems Spine editor crashs and down when I set like as below.
1) The UI ratio as not power of 50% - like as 175% or something
2) Interface linear filtering ON
I think some process about HiDPi support changed with lastest version and it makes this happen...
Can you check about this?
In our new launcher we managed to improve support for running older Spine versions, so I'm glad that has proven useful for you. Apple can be pretty nasty and may do something similar again in the future, in which case it may not be possible to run older versions of Spine. Updating to the latest macOS is a bit scary when Apple doesn't care about breaking existing apps!