The macOS/X package on Itch.io does not contain an exectuable when installed through the launcher. Itch.io automatically extracts the pkg(which is a modifed zip file), which produces three non-executable files (Bom, PackageInfo, and Payload). This can be fixed by downloading it directly from the browser (outside of the Itch.io software). After downloading, open the .pkg as a normal file. Then the software will install as normal.
Majick Tek Games
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Monkey X community · Created a new topic IMPORTANT FOR macOS/X USERS USING THE ITCH.IO LAUNCHER