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Hp elitebook 840 g1 Cpu: intel core i5 4300U Gpu: intel HD 44000 1536 MB and AMD Ram: 8 Gb https://www.notebookcheck.net/Review-HP-EliteBook-840-G1-H5G28ET-Ultrabook.114717.0.html

Is it possible to explain a little more about it, there is really no solution for it, because I have to hold the power button to turn it off. Also, my network card is inactive, what is the solution for it? Finally, which part of the forum can I request the opencore file of my laptop, thank you very much for your reply.??

Thanks, The thing is, when I turn off the system, I get this error and it goes into an infinite loop, and I also have no sound.

Guys, I got an error while installing mac big sur, what is the cause of this error, please help. Sound assertion in AppleMikeyACPI at line 436 ... My laptop is hp elitebook 840 g1.