5,1 to 4,1 question


i tried putting 5,1 boot drive in 4,1 no success booting (somewhat suspected).

upgrading 4,1 firmware 5,1 sufficient work or there lot more involved? i'm trying avoid installing os scratch.
 

should have been fine. when changed 3,1 5,1 (flashed 4,1) took ssd out of old mp , put in new one, repaired permissions , bob became fathers brother.

os x that, windows on other hand **** bed :)
 


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