removal all contents of 2011 MacBook Air
Please advise how to remove all contents of 2011 13"MacBook Air
MacBook Air 13″, macOS 10.12
See the following Apple Support article for information on clearing everything from a Mac. Skip step 2 as it only applies to newer Macs and use the other steps instead. What to do before you sell, give away, or trade in your Mac - Apple Support