Mac Frame Gen App Adrenaline Hits App Store Free, But FSR 1 Flaws Hurt Quality

Independent developer General-Duty9073 released Adrenaline, a macOS frame generation tool that lets Mac users boost gaming framerates without modifying game files. The app is free on the Mac App Store until August 31, 2026, but early testing shows significant compromises in image quality and thermal performance. Gamers running fanless Macs should expect throttling and visual artifacts that may outweigh the framerate gains. We tracked the release to see how this open-source approach compares to existing solutions.

Developer tool uses older upscaling tech to double framerates on macOS without game modifications

Adrenaline operates as an external overlay that intercepts the display output rather than injecting code into games. The developer built the tool using Apple’s ScreenCaptureKit API to capture the screen and apply frame interpolation in real time. This architecture avoids the need for game-specific patches or binary modifications, which simplifies installation for users who prefer not to tinker with system files. The app runs as a standalone utility that sits alongside the game window.

• Frame Generation Technology: AMD FSR 1
• AI Model: RIFE (Real-Time Intermediate Flow Estimation)
• Apple Integration: Core ML
• Capture Method: ScreenCaptureKit
• Test Platform: M3 MacBook Air

The core technology relies on AMD FSR 1 for frame interpolation and the RIFE AI model for motion estimation. The RIFE model, originally an open-source deep learning framework, was converted to Apple’s Core ML format to run efficiently on Mac hardware. These components work together to generate intermediate frames between existing game frames, aiming to double the perceived framerate from sources like 30 FPS to 60 FPS. The implementation uses older upscaling algorithms rather than newer, more advanced methods.

Users and analysts report that the FSR 1 implementation causes noticeable visual artifacts, ghosting, and degraded image clarity during fast motion. The low base framerate of 30 FPS combined with the generation process introduces high input lag, making the experience feel unresponsive. On fanless devices like the M3 MacBook Air, the heavy computational load triggers thermal throttling, which further reduces performance over time. These trade-offs limit the app’s usability for competitive or fast-paced gaming sessions.

The app is available for free on the Mac App Store in the US until August 31, 2026, after which its availability or pricing may change. General-Duty9073 has expressed hope that future updates will support newer upscaling technologies to improve image quality and reduce lag. For now, the tool offers a functional but imperfect solution for Mac gamers seeking higher framerates without hardware upgrades. Users should test it with their specific titles to gauge whether the framerate boost justifies the visual and thermal costs.