Using 32-bit plugins in Unity 5

I have been using Unity 3.5 - 4.6 on Mac OSX and am depending on a plugin from the Asset Store called “Midi Unified”

I want to move my project over to Unity 5.

Currently, however, since Unity5 is 64-bit only, my plugin will not work.
I’ve contacted the creator and not had any response - it seems that they may have stopped supporting this asset.

Is there a workaround for this?

Will Unity5 get a 32-bit mode for Mac OSX?

It looks like you can build for 32-bit platforms and must use 32-bit plugins for those platforms (with the exception of OSX), but you cannot use 32-bit plugins for the unity editor because the editor is only available as a 64-bit platform.
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