I'm playing the demo version on a Mac and every time I log in, it says Sorry, but we can't connect to our servers. Please make sure that you are online and that Minecraft isn't blocked.
First, attempt to uninstall Java and reinstall it. If you are using a 32 Bit machine, refrain from getting the 64 Bit Version. People mess that up a lot
If that doesn't work, delete the entire .minecraft folder. Back up any saves/mods/resourcepacks you want to keep. redownload the launcher
Also save the servers.dat file in case you want to keep your servers that you don't remember the IP :)
Third, check your internet connection. If you are using WiFi, make sure you are reasonable distance from your router.
Make sure there isn't anything wrong with the Minecraft.net website. Try logging in there or at Mojang.com. Try migrating your account.
protected by Community♦ May 20 '14 at 21:10
Thank you for your interest in this question.
Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?