How to fix Run-time error '53', MathType.bundle on my Mac?

Question

I have this problem everytime I open Word and PowerPoint. How do i fix this? It says something about an add-in named mathtype.bundle.

Answer 1

Hi,

I suggest you try to remove Office completely to troubleshoot the issue, you can refer to this support article to get more information:

https://support.microsoft.com/en-us/office/troubleshoot-office-for-mac-issues-by-completely-uninstalling-before-you-reinstall-ec3aa66e-6a76-451f-9d35-cba2e14e94c0

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Answer 2

At one time you had the MathType add-in installed on your computer. Then later, you removed it, but a macro-enabled file was left behind. Here's how to check the most likely location for the file causing this message:

1. Close Word and Excel. In the Finder, click on the Go menu while holding down the Option key. Choose Library. Your hidden user library folder opens.
2. Open ~/Library/Group Containers/UBF8T346G9.Office/User Content/Startup/Word.
3. If there is a .dotm file in there with Mathtype in the name, or if there is only one .dotm file, drag it to your desktop.
4. Open ~/Library/Group Containers/UBF8T346G9.Office/User Content/Startup/Excel and check for an .xlam file. Drag it to your desktop.
5. Reopen Word and Excel to check that the messages have gone away.