I can't play MineCraft online (PC/Mac)?

For some reason I can't play MineCraft online. I can't connect to my own server or any other server for that matter. Every time I try joining a server I get this message: 'Failed to connect to the server' - 'Failed to login: The server encountered an unexpected condition which prevented it from fulfilling the request'. Now, I play on these servers all the time on my Mac, but for some reason they're currently not working.

Any help would be great! I don't play single player so it's kinda annoying. I have my own mini server which I play survival on my own and is the same as single player but at least friends could join if they wish.

I re-downloaded the game and also disconnected and reconnected to my internet but still no luck

Typically that message means its a problem on Mojang's end, so no one can connect to any server at that moment. You'll be able to connect once Mojang fixes the issue on their end.