Where can i find EFI firmware 1.6 for 17" 2009 Macbook pro

Hi I'm havng freezing beechball issues with my Crucial M4 SSD and my 2009 17" MacBook Pro and have read that downgrading the EFI firmware from 1.7 to 1.6 can solve the freezes can anyone point me to where i can get this as the links I have found out there are only compatible with the 13" and 15"
Thanks for your help

David Goodman wrote:
...have read that downgrading the EFI firmware from 1.7 to 1.6 can solve the freezes...
Where did you read that?
Everything Apple says is the firmware can only be upgraded and not downgraded.
Apple is only going to supply the lastest firmware updates here:
https://support.apple.com/kb/HT1237
and to apply is here
https://support.apple.com/kb/HT2213

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