Late 2009 iMac 21.5

Hello, I’ve replaced the stock dual-core E7600 with a quad-core Q6700. The system boots with Windows/Linux, the CPU is detected but only 2 cores are available. Is it possible to mod the Mac’s BIOS to allow 4 cores?

@Blob
Welcome to the Win-Raid forum!
As the Forum’s name indicates, we do not support Apple BIOSes.