How can I find out whether my MacBook is supported by Lion? Lion requires MacBook Late 2008 Aluminium or Early 2009 to install/upgrade. How can I find out whether my MacBook is capable of running Lion if I forgot when I bought it?
About This Mac &gt; More Info... will give you a model # and serial #. With those, Apple can tell you whether your machine is compatible. Or you can look in the table on this iMac page on Wikipedia to identify your machine.  Or compare the physical requirements for Lion to what you find in About This Mac.