I’m on PC. But I could try on a mac next week.
I’m not sure the problem can come from mac or PC as it is a webinterface that should be crossplatform.
So, do you have only a grey blank page in place of the UI when connecting to the opensprinkler IP ?
Interesting that I’m not the only !
But, about mac and pc, I could not update the opensprinkler on pc where it wasnt recognized (windows and ubuntu) and I had to use a Mac to do it.