Saturday Mac riddles 141

Here are this weekend’s riddles to entertain you through family time, shopping and recreation.

1: Autograph, musical time, app verification.

2: Laurence Tureaud checks for Trojans and more.

3: Looks like music with a diced stew to verify an app’s integrity.

To help you cross-check your solutions, there’s a common factor between them.

I’ll post my solutions first thing on Monday morning.

Please don’t post your solutions as comments here: it spoils it for others.