unrecoverable error security agent was unable to create requested mechanism builtin:prelogin

I erased my system because I was about to send my mac for repair. After I got my mac back,

I was trying to recover the system from my time machine backup and after serveral hours waiting, and I got this error.


Now here is the tricky thing. After I saw this error. I tried various ways to reboot my computer and redo the system recover, but everytime I ended up with this error message, here is the list:

directly press on/off -> apple logo -> this error

command + R -> apple logo -> this error

option + command + R -> apple logo -> this error

shift + option + command + R -> apple logo -> this error

option + command + P + R -> this error

option -> select "macintosh HD" -> this error

shift (safe mode) -> this error

command + V -> this error

So basically I have run out of all startup options.


other info: macOS backed up version in time machine: Ventura

Mac: intel mac A1708

Posted on Sep 4, 2023 11:42 PM

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Sep 5, 2023 6:56 PM in response to tao158

Hello tao158,


We understand you are getting a particular error message with your MacBook Pro and aren't able to restore or recover your MacBook Pro. Because you've already tried various ways to restore your Mac, we'd next recommend reaching out to Apple Support directly.


You can reach them here: Get Support


You can also find the support phone number for your region at this link: Contact Apple for support and service


Take care.

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unrecoverable error security agent was unable to create requested mechanism builtin:prelogin

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