Hello Moses,
macOS itself should not prevent file uploads in Business Central—Microsoft officially supports the latest Safari on macOS, and the standard file-upload/drag-and-drop functionality is supported in the web client; the documented UploadIntoStream limitation applies to iOS devices such as iPads, not macOS. Since you can reproduce the issue on multiple Macs, I would first test the same action directly in the latest Safari web client rather than the installed BC app/PWA; if it works in Safari, the issue is likely client-specific, but if it fails there as well, capture the exact BC version, macOS/Safari versions and reproduction steps and open a Microsoft support request through Business Central Admin Center → Support → New Support Request. A forum post itself will not normally result in a patch being scheduled, whereas a reproducible support case can be investigated by Microsoft and, if confirmed as a product defect, included in a service update.
Regards,
Oussama Sabbouh
