The annoying problem after the update is that affinity photo crashes too many times. When saving my work it will automatically shut the file down and within 10 seconds give a crash report stating, " affinity photo quit unexpectedly". What's going on here Serif? Also....when adjusting my blend ranges, it's slow to my commands. Like a snail. The other interesting issue is that my history will just go crazy and start backing to previous steps. These issues are becoming annoying. What mac os version must I be on to make this run smooth and what is the oldest mac os version your 1.7 can run on? El Capitan?