We bundle up UE4Game-FMODStudio-Mac-Shipping-Static.a, could you try renaming that to remove the “UE4Game-” part? The names of all the produced libs is different depending on if the plugin is build from the engine or if it is used for the binary release of UE4, so these sort of mismatches have occurred before.
That is all cleaned up in 4.8, which has a much better naming scheme for plugins as well as a way to build plugin binaries simply from the command-line.
We had a hold-up with 4.8 due to an engine change, but we’ve got that sorted and so we’ll have a 4.8 build out tomorrow. If you are planning on upgrading, then it should just work in 4.8.