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How can I determine if my computer/operating system is 64-bit?

Title   How to determine if your OS is 64-bit compliant
Author Pete Huckelba, StataCorp
Date June 2005; updated June 2013

Windows

Windows 8: press the 'Windows' key on your keyboard to return to the Start screen. Type control panel and press enter to launch. Click on System and Security -> System. The System type: line will detail the operating system type:

Windows 7: click Start -> Control Panel -> System and Security -> System. The System type: line will detail the operating system type:

Windows Vista: click Start -> Control Panel -> System and Maintenance -> System. The System type: line will detail the operating system type:

Windows XP: click Start -> Run and type dxdiag. If a Windows dialog box is displayed asking if you want to verify your drivers, you can safely click No and continue. When the program has finished loading, you should see something similar to one of the following images:

The Operating System line refers to Windows <some version> x64 or 64-bit edition. The last image above specifies the processor Itanium, which is a 64-bit processor.

Mac

Select About this Mac from the Apple menu. The text below Mac OS X will give the operating system version, and the Processor line will detail the processor type.

about this mac

Mac OS X 10.6.8 (or greater) is a 64-bit operating system. Stata for Mac is available only for 64-bit Intel-based Macs.

All currently shipping Macs have a 64-bit processor and a 64-bit operating system.

Linux

Linux users should type the uname command. Depending on the platform, you may see

[cph@gaylord ~]$ uname -a
Linux gaylord.stata.com 2.6.11-1.27_FC3 #1 Tue May 17 20:24:57 EDT 2005 x86_64 x86_64 x86_64 GNU/Linux

[cph@caddo ~]$ uname -a
Linux caddo.stata.com 2.6.9-5.0.5.EL #1 SMP Fri Apr 8 14:20:58 EDT 2005 ia64 ia64 ia64 GNU/Linux

[cph@tango ~]$ uname -a
Linux tango.stata.com 2.6.10-1.771_FC2smp #1 SMP Mon Mar 28 01:10:51 EST 2005 i686 i686 i386 GNU/Linux

In the above listing, 'gaylord' (x86_64 GNU/Linux) and 'caddo' (ia64 GNU/Linux) are 64-bit compliant. 'tango' (i386 GNU/Linux) is only a 32-bit platform.

Unix (Oracle (Sun) Solaris, IBM-AIX)

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