Then from any directory, run this command Then enable root user, and using the terminal, copy these commands one by one: Copy and paste or type in the following:.From the Utilities menu, select Terminal.Press and hold CMD + R on your Mac keyboard.In order to switch off the System Integrity Protection, you firstly need to boot your Mac from the built in recovery partition, to do this follow the steps below Problem is, folders in the location are protected by MacOS so you have to temporarily disable that protection so you can disable the stupid plugin. System/Library/QuickLook/Office.qlgenerator Well it still doesn’t work, so it needs to be disabled again. I have in the past disable this and it lasted for a long time, but the recent updates re-enabled this feature due to it being… updated. With older versions of Office, this function makes Excel think someone has the file open, and subsequently opens the file as read only. There is a function in Mac OS that previews files so that you can kinda see what a document looks like before you open it.

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