The 1.0 version of SplitViewShortcut for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this free software for Mac is Raj Nigam.
From the developer:
SplitViewShortcut is an Accessibility scripting project that finds an effective solution to the lack of a keyboard shortcut to trigger OS X's new Split View action. This utility finds the zoom button using Accessibility, and then creates a click-and-hold mouse event to start Split View.