Hi @Osman Vural ,
To narrow down this issue, let's verify the followings:
- Are you using SharePoint integrated with CRM? SharePoint Online or SharePoint Server?
- How about uploading a .pdf file can be opened normally on your OS to SharePoint and re-open it in SharePoint folder?
- Does this issue occur only to you or to multiple users?
As per my research, this issue seems to be more related to MAC OS, here are some similar issues for your reference.
https://discussions.apple.com/thread/252433107
https://community.cryptomator.org/t/the-finder-can-t-complete-the-operation-because-some-data-in-xxxx-xxx-can-t-be-read-or-written-error-code-36/796
https://discussions.apple.com/thread/8332160
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