Latest Apple iMac 27" (2017) user agents:

User Agent	Browser	Platform
Microsoft Office PowerPoint/16.54.1010 (Mac OS/11.5.1; Desktop; en-US; NonAppStore; Apple/iMac18,3)	Microsoft Office PowerPoint 16	Mac 11
Linux UPnP/1.0 Sonos/57.9-23010 (MDCR_iMac18,3)	Unknown	Mac