To run the latest version, your Mac should meet these specifications: macOS 10.14 (Mojave) or later.
If you're on OS X 10.13 or earlier, you'll need to use "Legacy Builds" found on the official shinywhitebox site. Is it Free? Download iShowU Studio for Mac | MacUpdate iShowU Studio 2.3 for Mac Free Download
Unlike basic recorders, iShowU Studio allows you to add text, annotations, transitions, and pointers directly within the app. To run the latest version, your Mac should
Capture, Edit, & Share: Why iShowU Studio 2.3 is a Game-Changer for Mac Users To run the latest version
Supported on both Intel 64-bit and Apple Silicon.
Need to demo a mobile app? Connect your iPhone via Lightning cable to record directly from your device alongside your desktop. System Requirements & Availability