Hi LydiaFife,
We test it on our Mac and didn't encounter the same situation. May I know have you tried restart you Mac. If not, you can try it and check the result.
In addition, the latest version of Excel for Mac is 16.27 (Build 19071500). I know your Excel also is 16.27. But Build version difference may also affect Excel usage.
So please update it if your Excel for Mac is not the latest build version.
To update: open Word>On the top menu, go to Help > Check for Updates.
If update Excel didn’t solve this issue , you can remove files from your user Library folder to clear the Excel cache:
1.In Finder, press
Command +Shift+g.
2.In the window that opens, enter
~/Library and then click Go.
3.Open the
Containers folder and ctrl+click the below folder and
Move to Trash.
com.microsoft.Excel
If this issue still persist, in order to check whether it related to add-ins in Excel, you can remove add-ins by this way:
Open
Excel>Insert>My Add-ins>See All>right click the add-ins and select
Remove
You can also open mac in Safe Mode to check whether it related to incompatibly login items:
1.Start or restart your Mac, then immediately press and hold the Shift key.
2.Release the Shift key when you see the login window
3.To leave safe mode, restart your Mac without pressing any keys during startup
If you still need help, in order to help you effectively, could you provide the following information:
1..Is it that just one specific Excel file have this situation or all the files have this situation?
2.What about other Office applications?
Regard,
Nina