Mac Crashing From Mystcraft Age

[MinimanTheFirst]

I'm having a huge problem with Mystcraft Ages. At first I can enter and re-enter mystcraft ages just fine. Then I start crashing. Here's part of the Crash Report that I think is the main cause:

java.lang.IllegalArgumentException: Could not get provider type for dimension 28, does not exist
at net.minecraftforge.common.DimensionManager.getProviderType(DimensionManager.java:157)
at net.minecraftforge.common.DimensionManager.createProviderFor(DimensionManager.java:304)
at net.minecraft.world.WorldProvider.func_76570_a(WorldProvider.java:207)
at net.minecraft.client.multiplayer.WorldClient.<init>(WorldClient.java:62)
at net.minecraft.client.multiplayer.NetClientHandler.func_72483_a(NetClientHandler.java:1045)
at net.minecraft.network.packet.Packet9Respawn.func_73279_a(SourceFile:28)
at net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:461)
at net.minecraft.client.multiplayer.NetClientHandler.func_72551_d(NetClientHandler.java:266)
at net.minecraft.client.multiplayer.WorldClient.func_72835_b(WorldClient.java:94)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1862)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:835)
at net.minecraft.client.Minecraft.run(Minecraft.java:760)
at java.lang.Thread.run(Thread.java:695)
--- END ERROR REPORT 4b3e7c7a ----------

This happens when I'm on a server and I'm tired of going into my player data to change the dimension to 0 (using an NBT editor). Any way I can permanently fix this glitch? The mystcraft version is 0.10.5.00 for 1.5.2

Also, it only seems to affect Macs as my friends (who all own windows) don't have this problem. For the full crash report, here it is:

 

[MinimanTheFirst]

Also, I can enter other dimensions like the Twilight Forest and the vanilla dimensions just fine. Anyone know what to do (other than delete my player data or reset the server?)

 

[Gaz_]

What modpack is this?

Also try the following:

http://desk.feed-the-beast.com/index.php?/Knowledgebase/Article/View/9/0/basic-troubleshooting

 

[MinimanTheFirst]

This is the Unleashed Modpack version 1.1.3. Thanks for the link

 

[MinimanTheFirst]

Considering how the only reason I use FTB is for a private whitelist server my friend owns, I'm not backing up anything (I don't have any texture packs and world saves)

 

[MinimanTheFirst]

The problem appears to be fixed. Thanks