I'm trying to redeem my code for the Sierra GM, but the MAS is not cooperating (currently on 10.11.6). Most of the times I try to get to the Redeem Code screen I get a "Http/1.1 Service Unavailable" error. Sometimes it asks me to sign in to my account and then it throws me "An unexpected error occurred while signing in. The server gave an error during download: 503 Service Unavailable.". If I am able to get through to the Redeem screen and put in my code it tells me "Code Redemption is unavailable. Try again later." most of the time. One time it went through, but told me I need to accept new MAS terms & conditions. When I hit accept, it gave me "Http/1.1 Service Unavailable" again. It's been like this all day for me (about 6 hours so far). I've checked the Apple Systems Status page and it's showing greens all the way down. I've even connected to different VPNs to try and get a different Apple CDN. When I connected to Australia (I'm in the US) was when I finally got through to the Redeem Code page.