luacs1998

Restart minecraft, all should be fine. If it isn't then get us the FML log.

I'm not a mac user, but try going into security settings or something and setting the installer jar as trusted or something?

Quit using 1.6.2, update to 1.6.4.

1) Use the installer 2) Optifine isnt our problem.

If there's a "Open anyway" button, use that. If not tell your anti virus/OS not to be so trigger happy. If it still doesn't work then we need to know what OS you're using.

Still a mod problem.

FYI, the jar files work for me, if not I wouldn't have linked them. If you really do have a problem, download ftb and copy the libraries from there.

Try removing mods until you find the culprit, forge does nothing to world gen.

Get java profiler data.

Use the vanilla minecraft launcher.

Don't attach the log file, pastebin it.

Most likely a mod problem.

Fix your links, and pastebin the FML log. I hate dropboxes.

That's heap you see in F3. PermGen is a completely different kettle of fish. [lmgtfy]how to increase permgen size[/lmgtfy]

Problem with thaumcraft, you might want to see azanor with a full account of what you were doing ingame when the crash happened.

No.

Extra Biomes problem.

Nothing?

Problem with rei minimap, it isn't updated for 1.6.4

Read the EAQ.

Read the EAQ, the files you need are there, the file server intentionally removed it.

1.5.2 is no longer supported. Update to 1.6 or solve your own problems.

http://www.minecraftforge.net/forum/index.php/topic,13271.new.html#new

Have you tried updating to Mavericks (10.9, look in the App Store) and Java 7? Get us a console log.

You need to select the forge version in your custom profile.