Get MarketMover.
The App Store edition for iPhone, iPad and Mac, which reads every book and never places. And the Pro edition for the Mac, which places, as a direct download.
MarketMover Pro for the Mac.
The edition that places, as a direct download. Signed with Apple's Developer ID and notarised, so it opens like any other Mac app. The download is free; the licence, bought on the Pro page, is what unlocks it.
Installing it
Unzip the download and drag MarketMover Pro into Applications. Open it; macOS checks Apple's notarisation ticket and lets it through. The first launch asks you to read and accept the terms of placing, and again every 90 days.
Paste your licence key into Settings, under Licence. Until then the app behaves like the free plan: every screen works, nothing places.
Updates: the app checks this page's manifest at launch and tells you when a newer build is here. Download it the same way; it replaces itself in place.
MarketMoverPro for the Mac
Send a note and the first Mac builds and the way to buy come to you first.
Opens your email app with a note to Daniel. Your address is kept for the invitation and nothing else, and deleted once it has gone out.