Share Point Browser on some Safari sites.

The reason is clearly given in the screen shot as share point browser plug in does not support the highest level of security for safari plugins .

It should be kept as OFF or Ask , trust is risky .

Read an article : How to use Internet plug-ins in Safari for Mac - Apple Support

Microsoft SharePoint is a browser-based collaboration and document management platform from Microsoft. Microsoft's content management system. It allows groups to set up a centralized, password protected space for document sharing.

I would ask here since SharePoint is a Microsoft product

sharepoint mac - Microsoft Community

https://answers.microsoft.com/en-us/search/search?SearchTerm=sharepoint+mac&IsSu ggestedTerm=false&tab=&x=0&y=0&CurrentScope.ForumName=&CurrentScope.Filter=&Cont entTypeScope=#////1

open safari & its preferences , select security & check the box of internet plug- ins , click on plug - in settings .

Check the box of share point browser plug - in & keep its as OFF .