ALT (Option) Dosen't work for Anything Command at start
i will use startup manager for booting with usb device but ALT ( Option) doesn't work at starting up, i search solve in google i find to reset NVRAM with "CMD + Option +P+R" This command doesn't work too because ALT ( Option) not working for any Command have this button
ALT (Option) Work in OS but at starting up not working please help me!!
I disable SIP and i Enable it and no result.
Is this a good question?