Frame generation is no longer offered. Its component, lsfg-metal, leaves Highball at its author's request over a licensing dispute he did not want to carry, so the engines get revisions without it (r11 on the default line, r12 on the GPTK 4 line, the same files otherwise, nothing new to download) and no engine ships it any more. An environment that already has it keeps working as it is until it moves engine. The Lossless Scaling DLL was always your own purchase and is untouched.
Steam games with a native Mac build are pointed out, and the Mac build comes first.
The Steam badge carries an Apple logo when the game has a native Mac build on Steam, lit when Steam for Mac has it installed, and those games count as installed. The game's page gets a card above the verdict saying the purchase already includes the Mac build, with its requirements when the database knows them. Play on Mac starts it through Steam for Mac, and Install on Mac hands the install to Steam for Mac's own dialog, with the Windows build one click away for mods or a port that lags behind. Which games count comes from the database first and Steam's store page second, asked once every two weeks in the background, never on the way to Play. Thanks to zxkevinxz for the contribution (#211).
A hovered tile in Continue playing is no longer cut at the top.
An engine can now ask for registry values under a program's AppDefaults key, mirrored into every environment on that engine before a launch. No engine uses it yet.