so I was working for 4 hours straight on a cool mod review map and it was a lab at level 1. I placed a non-vanilla block were the last layer of bedrock should've been and my minecraft crashed, when I opened it up, the launcher did the usual "get.SystemInfo" or something but then before I got to the part were it shows the changelog the screen becomes blank. I tried without that save and it works but with it, the launcher fails but I really need that map, help? (I use mac and this was with minecraft 1.6.2 with forge and the block was seared bricks from tinker construct, also including that mod I use 36 mods and have not had an issue before with any of them)
the launcher is blank