File Request iMac "Core i5" 2.8 27" (Mid-2010)

[iAssist]

When installing high sierra , machine beeps i can see it wants to do a firmware update but then shuts down and turns off
Please can u assist in lastest firmware file for this machine, It can install only old old os like lion

SN: W80244UMDB5

 

[Vahab Hemmati]

send exact device and board model