I'm looking to replace a macbook pro 2012 with a new one so that I can continue to run some old software that is compatible with Lion but nothing newer from Apple. Although it's old hardware, most of the new macbook pro 2012 are being shipped with Mavericks or El Capitan. Theoretically, I should be able to install Lion since it used to be factory installed ( https://support.apple.com/en-us/HT204319 ). But theory and reality are two different things. If I format the drive and boot to a Lion disc, will it let me install it? Will everything work correctly? I won't be able to test it until I buy the computer. And I'd only want this model if I can still run Lion on it. Thank you for your help.