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K64Enabler lets you enable / disable the 64-bit Kernel of Mac OS X 10.6 Snow Leopard. The 64-bit Kernel is only enabled by default on server configurations.
Note that regardless of which kernel is used, Mac OS X can run 64-bit and 32-bit applications concurrently.
What are the K64 capable machines?
Mac Pros, MacBook Pros and iMacs are compatible with K64. You need the following machines or better:
iMac Core 2 Duo (early 2008) --------------------------------- iMac8,1
MacBook Pro Core 2 Duo (2008) ----------------------------- MacBookPro4,1
Mac Pro 8-core (early 2008) ----------------------------------- MacPro3,1
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