A:
The Companion 20's do not use the USB version of audio output, they use the an AUX. if you mean you want to power them using a USB then unfortunately that won't work either, they must be plugged into a wall outlet. however, they will work with you mac. it will work with anything with an AUX connection and an ability to play sound. if you want them to play loud home audio system status than i recommend you not get these, and go for either the companion 5's or the Cinemate GS series II those are so much better and worth the investment. however if you looking for some speakers for your rom and than these are more than perfect, you can have a party in your room now, or in your living room. house party? go for any of the other two(just using a party as an example, because i use mine for that). as for spotify, you can now download it in mexico. just got to spotify.com and at the bottom of the site there is a flag and a country name. clock on it, see list of all countries and choose mexico.