Splash is not available for Mac but there are plenty of alternatives that runs on macOS with similar functionality. The best Mac alternative is VLC Media Player, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Splash and many of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Splash are Kodi (Free, Open Source), MPlayer (Free, Open Source), KMPlayer (Free) and GOM Player (Freemium).
KPlayer is a video playback app. If 'H.264 Hardware Acceleration' is supported, it can play 720p, and 1080p video files more smoothly. Also you can enjoy a movie in the concise interface with the high-quality subtitles that are displayed quickly.
Quickfire is a video player for film, video, animation and VFX professionals - or anyone who wants advanced control over their movies. Written by VFX Supervisor Chas Jarrett - it gives you many useful features not found in any other player.