When I attempt to scroll while pressing shift with my mac, the hot bar select immediately stops on the gun. I can scroll normally when holding shift, but when I go over a gun it stops. I don't have a crash log as this doesn't cause a crash. It is quite irritating however as I would like to make use of dual wielding. Thanks in advance.

@Maxzon, do you have EnderIO installed?

I was unable to dual-wield as well, but only when I have EnderIO installed.

I'll look into EnderIO's config files and check back if I manage to find a solution; but for now, it looks like this is an incompatibility with EnderIO.

Edit: I can't find anything in the config, seems to be a direct issue between Flan's and EnderIO

I do as a matter of fact, I recently made myself a new modpack without any energy mods, so I will attempt using it now. Thank you very much for your reply.

No problem, glad I could help!

Now we just need someone to find out where the issue between Flans and EnderIO comes from and submit a pull request to fix the issue.

I have a mac, and I can use dual wield just fine n dandy. I haven't the slightest idea as to what could be causing your problem.

Hmm it may be my controls then, I'm running a lot of mods and some of them may be overwriting other controls. A mod that overwrites scrolling I haven't heard of however. Is it possible to change the way to dual wield? I looked through the config and just the unpacked jar folder but I couldn't seem to find anything that which had 'DUAL WIELD STUFF HERE' blatantly written on it.

Is there anything I can do?