Mac Direwolf20 1.6.4 Modpack does not save my progress on single player maps.

[starboy4356]

In Direwolf20's 1.6.4 modpack my single player saves do not save my progress. Do you guys have any idea whats wrong? Also it lags like crazy even if i have 6Gb of ram allocated to it. Any help would be appreciated.

 

[starboy4356]

Also, I went on a huge mining trip and built a forge from TiCo and I went to the nether to get cobalt and I went back to the over world and had a different spawn and all my ores and forge from TiCo were erased.

 

[starboy4356]

Ok, I've found what was happening, my world was corrupted, so I started a new one. Also i found out a way to minimize lag, I used optifine and set the option Advanced OpenGl = off when I logged into your single player world, and then back on to fast/fancy ( otherwise it will make your game freeze like crazy for 30 sec then unfreeze for 2 sec...etc...) Hope that helped anyone in need.