after installing the latest update(3.7)of Pixelmator via the Mac App Store the next time a launched Apple Photos it claimed that the Photos Library needed repairing. I clicked OK, it went ahead and repaired (what ever) and after that it decided it's necessary to re-upload my whole Photos Library (still working on it, eating away bandwidth and data volume) :(
Any ideas or plus ones one this?
Maybe a connection to changes in the Pixelmator Photos Extension?
MacBook Pro (15-inch, 2017)