Mike D: ‘After Yauch died I couldn’t make music. I’d open a computer file and just feel sadness’

As part of the Beastie Boys, the rapper shot to fame and notoriety in the 80s, before bandmate Adam Yauch’s death saw him withdraw from the spotlight. He returns with a solo album that sees him reckon with greed, mortality – and his past ‘It’s funny how far a joke will get you,” Michael Diamond grins. This time 40 years ago, the New York rapper known as Mike D was working with schoolfriends Adam…