ALT (Option) Has Disabled From MacBook At Startup & stay working in OS
ALT (Option) Has Disabled From my MacBook Pro At Startup i cant Load Startup Manager with this button But it working in OS but in startup (Power on) doesn't working.
i cant use Reset NVRAM (CMD + ALT+R+P ) because ALT don't stay working at boot
if i try reset NRAM MacBook go to Recovery Mode not NVRAM mode because it read only (CMD+R+P) not read (CMD+ALT+P+R)
i think ALT Disabled from my MacBook pro because i try Some Command last days like i disabled "SIP".. i enabled it again and no result ALT stay not working..
Please Help me i want boot with USB device for Install Mac OS to another Partion in my Hard Drive...
Thanks Dan & Bob but my problem not in startup manager the problem in ALT button does't work at Bootloader but it stay working in OS.. I try an external keyboard and not working too
i thank ALT disabled in my MacBook because i used some commands in terminal last days like i disable "SIP" and something like that and ALT button has disabled from my MacBook.
how i can reset all configure to enable ALT again ?
Maybe OS was disabled this button in startup ? if i remove partition ALT reset to work ?
Is this a good question?