MacBook Pro (early 2015) SD slot problem
My MacBook Pro SD slot doesn't see microSDHC with passive adaptor / multi card adaptor no matter I tried since I bought it. Please help.
MacBook Pro with Retina display, OS X El Capitan (10.11.2)
It's still in warranty, so make an appointment at the Apple Retail Store - Genius Bar and take it in for service. If you are not in the USA or cannot set up an appointment this way, then contact your local Apple Store directly.