I don't have MacOS installed at all, but I attached monitor readings from SpeedFan and openHardwareMonitor, and although they probably get the core readings correct, they both obviously fail on the GPU.
Attachments
temp_openhwmonitor.JPG (58.31 KiB) Viewed 15500 times
speedfan_monitor.JPG (33.34 KiB) Viewed 15500 times