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Accordingly, is a MacBook Air 32 or 64 bit?
To see if your Mac's processor is 32-bitor 64-bit, go to the Apple menu and choose About ThisMac. Below the operating system version and computer model nameyou'll see your processor. If the processor is an Intel Core Soloor Intel Core Duo, it's 32-bit only.
Herein, are all Macbooks 64 bit?
Go to the Apple Menu and select "About this Mac". If youhave a Core Duo processor, you have a 32-bit CPU.Otherwise (Core 2 Duo, Xeon, i3, i5, i7, anything else), you have a64-bit CPU. Mac OS X is fairly bitness-agnostic, soeither should work.
However, if your CPU has a 64-bitprocessor (like Intel's Core i5 & i7 series orAMD's Phenom and Athlon range), you have the option to install both32-bit x86 and the 64-bit x64 version ofWindows.