The command above displays an output similar to the example output below. Using the uname command, you can determine if your Linux kernel is 32-bit or 64-bit by running the command below. flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl est tm2 ssse3 cx16 xtpr sse4_1 lahf_lm Determine if the Linux kernel is 32-bit or 64-bit Below is an example output of the command above with lm in the information. If you don't see lm or see i386, i486, i586, or i686 in the output, then the CPU is 32-bit. If lm is found in the output, then the CPU is 64-bit. LinuxĪccess the command line interface on the Linux operating system, and enter the following command. The table above shows that all the most recent Mac computers are 64-bit processors. Once listed, perform an Internet search, using the CPU's processor name as a keyword, to determine if it's a 32-bit or 64-bit CPU. Open the Hardware section and find the Processor Name attribute.On the About This Mac window, click the More Info option.Select the About This Mac option in the Apple menu.Click the Apple icon in the menu bar at the upper-left corner.On a macOS computer, follow these steps to determine if the processor is 32-bit or 64-bit. There are no 64-bit versions of these operating systems. Windows operating systems, from Windows 95 to Windows 2000, are all 32-bit. If it has the text Windows XP Professional 圆4 Edition, the computer runs the 64-bit version of Windows XP.ĭetermine if Windows 2000 and prior is 32-bit or 64-bit On the General tab of the System Properties window, if it has the text Windows XP, the computer runs the 32-bit version of Windows XP.Press Windows key+ Pause or open the System icon in the Control Panel.Below is a picture and an example of this window.ĭetermine if Windows XP is 32-bit or 64-bit The System window, next to System type, lists 32-bit Operating System for a 32-bit version of Windows and 64-bit Operating System if you're running the 64-bit version.Instead, the Pause key is a secondary function of a function key, and you need to press the Fn key and that function key.

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