^ And, in fact, that's exactly what the documentation recommends you do in order to build jquery-wp-content. Use a VirtualBox VM. They even provide a pre-made VM.
Once you've built it, you'll need an instance of WordPress to run it on.
Sure you don't want to try a simpler approach, like Velocity?
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Sad news today for users of Dash, though. It was pulled from the App Store today. The developer tried to migrate his account from a personal one to a corporate one, and Apple balked at something or another, claiming "fraudulent activity". There's an active discussion on Slashdot. Speculation is either the new company name (the author hasn't mentioned what it is) is too close to another company (Dash Labs, Inc.) that makes completely unrelated software, or else competitor stuffing fake reviews in order to make the author look bad. (Unfortunately, a lot of this nonsense goes on, and they are CLEVER. Instead of stuffing bad reviews about your competition, stuff GOOD reviews about your competition, to make it look like your competitor is cheating!)
Dash for macOS is still available for direct download. Dash for iOS is no longer available, at least for now.
I think too many software developers are dependent on Dash for this to go unfixed. Apple is going to get an earful! I find Dash handy, and really great if you are working on an airplane, etc. A colleague uses it when working from his sailboat!