How do I launch Sketch in Safe Mode?
Sometimes an incompatible plugin may be causing Sketch to work unexpectedly or crash. You can use Safe Mode to run Sketch without plugins, in order to diagnose a problem.
To disable your plugins temporarily, close Sketch and then launch it again while holding down Shift. This will launch Sketch in Safe Mode. If the app now works as expected, it’s likely that any issues you were experiencing were caused by an incompatible plugin.