When No App Is Set to Open the File . Let’s say that when you double-click a file, your Mac asks what app you'd like to use ...

If you can't open JPG files even after that, consider resetting the app from the same menu. Doing so will remove all app data, effectively fixing issues caused by corrupt data. Open the JPG File ...

OneDrive users may experience issues while opening a file in the ‘Available when online’ status. At such times, you may see an error message box – Can’t open ...