PureMusic allows you to select tracks via iTunes, but apply EQ with PureMusic. They've got a free trial.
Thanks for the tip.
I used to have PureMusic but found it rather buggy and awkward to use. Didn't think it had EQ at the time.
I came across Amarra SQ which seems to be an equalizing plugin or app. A newer version, SQ+ will be coming soon.
Does anyone have experience with Amarra SQ and can it run on top of BitPerfect?