Same problem here, spotify has been working fine for as long as i've had it, but suddenly this offline error won't stop. it wasn't even a "oh it booted up and this happened" the error occured in the middle of a song!
I've had this problem for months now, strangely when I signed up for premium. I've done everything; uninstalled, changed sound quality, turned off my firewall... I can't see why it's having this issue when it works fine on my iPad 95% of the time. My internet is slightly unreliable recently but it still can stream whole movies, video chat, watch YouTube and download stuff off iTunes just fine, so why can't I stream Spotify?
Need a solution ASAP, or I'll just cancel premium.
I've had this same issue on two different networks, but I was able to fix it. For me, Spotify wasn't resolving through the DNS, so switching from your ISP's to Google DNS or OpenDNS fixed the problem for me.
Right click on your network in the bottom right corner and click "Open Network and Sharing Center
Under "Connections", click on your primary connection (either Wi-Fi or Ethernet)
In the bottom-left of the popup window click on "Properties", then double-click on "Internet Protocol Version 4"
Select the circle 'Use the following DNS server addresses"
Input these numbers in the boxes
Preferred DNS server: 22.214.171.124
Alternate DNS server: 126.96.36.199
Press "Ok" to confirm
Click Apple > System Preferences > Network.
If the lock icon in the lower left-hand corner of the window is locked, click the icon to make changes, and when prompted to authenticate, enter your password.
Select the connection for which you want to configure Google Public DNS. For example:
To change the settings for an Ethernet connection, select Built-In Ethernet, and click Advanced.
To change the settings for a wireless connection, select Airport, and click Advanced.
Select the DNS tab.
Click + to replace any listed addresses with, or add, the Google IP addresses at the top of the list:
I am trying to listen to Spotify at work (it is allowed). But by doing the change you mentioned, I lost totally internet connection. Guess the company connection policy does not allow that setting. Thanks anyway.
Hey I'm having this problem as well now. I tried to do what KoNaBoYo912's said but I don't see an Airport option anywhere. I'm guessing that it's changed with OSX 10.10. Can anybody help me with this? It's really frustrating that I can't use Spotify on my computer even though I'm paying for it, any help would be greatly appreciated!