by When troubleshooting your Mac, you often need to get information about your system and what’s going on inside of it, either to help you identify and fix the problem yourself or so you can convey that information to others who might help.
One tool that can help with this is a utility that used to be called System Profiler but as of OS X 10.7 (Lion) was renamed System Information. By either name, it’s a handy app that lets you look up all kinds of details about your system’s hardware and software, from the serial number and firmware version of your particular Mac to information about peripheral devices attached to it.
You can access this system profiler in a couple of ways. One is to go to Applications > Utilities and find System Information (or System Profiler if you haven’t upgraded lately) and open the program directly from there. Or you can open the Apple menu, click More Info, then select System Report.
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