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My 2010 MacBook Pro is stuck at the Apple logo and spinner (followed by a circle with a line through it). I accidentally mis-typed and altered the NVRAM setting. (as this sudo nvrm "rd=wrognserver"). I have already tried ⌘ Command⌥ OptionPR, to no avail (but suspect the keyboard is not working, I have ordered a wired USB keyboard, awaiting delivery). Any clues would be helpful.

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  • This is not an NVRAM issue - you are missing a boot device: apple.stackexchange.com/a/271683/119271
    – Allan
    Aug 6, 2020 at 18:33
  • Thanks Alan, Here is a bit more detail on the reason for suspecting NVRAM params.
    – Machachicago
    Aug 6, 2020 at 19:05
  • Hold Option while you boot. It will force the boot loader to scan all attached volumes for bootable partitions. A wrong variable will get ignored so what you entered has no effect. You can also delete it by issuing the command nvram -d rd
    – Allan
    Aug 6, 2020 at 19:09
  • Thanks Alan for the quick response, I tried cmd +R with the OSX install Cd, which came with the MacBook Pro. I also tried to restore from the time machine backup (cmd+R) but no vail. Originally the command I used is : sudo nvram -d boot-args="rd=xysnsms" && sudo reboot. The reboot failed immediately after this command.
    – Machachicago
    Aug 6, 2020 at 19:16
  • did you hold option?
    – Allan
    Aug 6, 2020 at 19:19

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