Timeline for How to downgrade EFI firmware back to version 1.6
Current License: CC BY-SA 3.0
5 events
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| Dec 12, 2016 at 16:52 | history | edited | meustrus | CC BY-SA 3.0 |
added 12 characters in body
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| Dec 7, 2016 at 12:22 | comment | added | Robino | That is an excellent suggestion and I have up voted your comment. It would be jolly decent of you to pop that in an answer to my question however. apple.stackexchange.com/questions/263636/… | |
| Dec 5, 2016 at 21:04 | comment | added | meustrus | So sorry to hear that. It sounds like you have a MacbookPro5,2 (mid 2009) whereas I have a MacbookPro5,1 (late 2008). It is very important to use the firmware specific to your version. Running the update may tell you if the version is correct before telling you you cannot downgrade. As for fixing your brick, maybe you can use a firmware restoration cd? I found this: lifewire.com/mac-firmware-restoration-2259978 | |
| Dec 4, 2016 at 18:48 | comment | added | Robino |
Take note, the warnings are very real. I followed the instructions to the letter (although the terminal command needed to be run with sudo) on a MBP mid-2009. I got the reboot and the progress bar but then it rebooted and now is a brick.
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| Dec 10, 2013 at 4:22 | history | answered | meustrus | CC BY-SA 3.0 |