Kleuter
Kleuter
Have you tried SMC reset?
Same problem also happens with iMac14,3  SMC reset doesn't help.
Can also happen on iMac13,1 
Some more ideas from users: - command line utility that can accept the preset name as an argument - adding a Scripting Bridge dictionary to the app so that AppleScript...
Can't you upgrade 10.7 to 10.13?
Can you please record this beeping noise?
I don't mind, any chance for a sample code how to query those GPU list and T values? I don't own a hackintosh.
Related: https://www.apriorit.com/dev-blog/430-macos-kext-development
Some thoughts about this possible feature. This is obviosly limited to - Intel macs using Thunderbolt eGPU - Classic Mac Pro (5,1) - Mac Pro 2019 - Hackintosh A custom...
Please try to reset SMC as described here: https://support.apple.com/en-us/HT201295