Saturday Mac riddles 246

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

1: Once a Latin American dance on 445, it’s a year older than the Mac, and now the shared standard.

2: From 6 until 11 it shared files on 548, but is now on its way out.

3: From solar origins forty years ago, it became popular on 2049 in Unix before declining after 2000.

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.