How can I tell if I have a 64-bit edition of Windows or Mac OS X?
64-bit applications need a 64-bit edition of Windows or Mac OS X for them to run. 32-bit applications will work on both 32- and 64-bit editions of Windows and OS X.
The simplest way of finding out if you have a 64-bit system is to try installing a 64-bit download from this web site. Alternatively:
This Microsoft article shows you how to find out whether you have a 64-bit edition of Windows:
To find out whether you have a 64-bit edition of Mac OS X:
- Click on the Apple symbol in the top left of the screen and choose "about this Mac".
- You will be shown a dialog showing you the OS X version and processor type.
- As long as you have a version of OS X that is 10.5 or greater, and you have a 64-bit processor then your Mac is capable of running 64-bit programs. To find out if you have a 64-bit processor go here.
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