This morning my menu bar started flashing and I was unable to Shutdown. I tried the usual Force Quit but could not get a response from it. The window appeared but it took "timing" to select the Finder and, even then, the Force Quit button wasn't functional.
I did a shutdown by holding the AC.
On reboot I checked around and most references to a flashing menu bar seemed to be related to the functioning of iSync. iSync is on my drive although the chances of me ever needing it are very, very slim. I opened its Preferences and unchecked "Enable syncing on this computer".
Should that be all I need to do (assuming iSync is the issue) or should I remove the application?
iMac (Retina 5K, 27", 2017), 3.4 GHz Intel Core i5, 8GB RAM, 2400 MHz DDR4
OS High Sierra 10.13.6
Canon MX710 Printer
Epson Perfection V500 Photo Scanner
Time Machine on 320GB OWC Mercury OTG Pro
Carbon Copy Clone on 500GB OWC Mercury OTG Pro