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updating bios snow leopard not boot

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Joined
Feb 12, 2012
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Snow Leopard
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i7 3.4 8gb
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Ati
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Classic Mac
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I have a gigabyte z68x-ud3h-b3....i have done an update of the bios, f12 version.
Before this i have already copied the relative dsdt for f12 bios on "Extras".
Now when i boot the system i have the white screen and a deny icon above the apple logo and freeze.
Someone knows what can i do?!
Thank you in advance....
 
Joined
Oct 9, 2012
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Gigabyte z490
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you dont have your Discs on AHCI mode, make sure you set this after the BIOS update.
 
Joined
Feb 12, 2012
Messages
4
Motherboard
Snow Leopard
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i7 3.4 8gb
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Ati
Mac
Classic Mac
Mobile Phone
Thank you for your reply...ahci mode enabled....same problem...
now i try to boot with iboot ..... :eek:(
in verbose mode i have this message

"still waiting for root devices"....for me there is an error on file /extra/dstdt.aml inside or incorrect version....
i have the backup inside my mac hd but i can't have access.....
 
Joined
Mar 17, 2011
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GA-Z77X-D3H rev1.1
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i5 2500K SandyBridge
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2x XFX HD 6870 DualFan
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Classic Mac
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  1. iOS
Thank you for your reply...ahci mode enabled....same problem...
now i try to boot with iboot ..... :eek:(
in verbose mode i have this message

"still waiting for root devices"....for me there is an error on file /extra/dstdt.aml inside or incorrect version....
i have the backup inside my mac hd but i can't have access.....

Boot with this flag: DSDT=0
This will make OS X boot without reading the DSDT you have in Extra
If you have trouble booting without a DSDT,use -x too ;)
 
Joined
Feb 12, 2012
Messages
4
Motherboard
Snow Leopard
CPU
i7 3.4 8gb
Graphics
Ati
Mac
Classic Mac
Mobile Phone
system freeze...panic cpu 2 caller 0xfffffff7f08864fc9 " cpu7 has no hpet assigned to intel powermanagement
kernel extension in backtrace com.apple.driver.appleintelcpupowermanagment 142.6.0
MAC os versione Not yet set

:eek:(

seems reset all previous config.... if i do a downgrade of the bios?!?
 
Joined
Feb 12, 2012
Messages
4
Motherboard
Snow Leopard
CPU
i7 3.4 8gb
Graphics
Ati
Mac
Classic Mac
Mobile Phone
resolved..in the bios there are 2 voices in the menu where i must select ahci.....
moreover i successfully changed the dsdt file with the previous and now it seem works.
thank you so much....
 
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