Apple Professional since 1999, Apple Certified Mac Technician since 2008
Antwoord op "Mag Safe power adapter"The MagSafe 2 85Watt Power Adapter is ONLY compatible with "slim" notebooks (MacBook Air, MacBook Pro Retina) circa 2013 and newer (excluding the 2015 MacBook and 2016 MBP).. If you need an adapter for a 2009 MacBook Pro (which is a Unibody, non Retina model), you'll have to look for a Magsafe 1 adapter. Do not purchase a used one, lots of self-appointed technicians are purchasing damages adapters and swapping cables with counterfeit parts. Probably not the best thing to say on iFixit, but I'd rather have a fully original adapter.