Request Description

Problem

On macOS, Minecraft fullscreen behavior differs depending on how fullscreen is triggered:

• Using Fn + F (or macOS native fullscreen behavior):

  • The game enters macOS fullscreen (Spaces / separate desktop)
  • This allows smooth switching between desktops (browser, Discord, etc.)
  • macOS display resolution remains unchanged
  • However, Minecraft still renders at full Retina resolution
  • On high-resolution displays this leads to unnecessary GPU load and reduced performance, especially with shaders

• Using F11 (Minecraft fullscreen toggle):

  • enters either borderless or exclusive fullscreen depending on the current configuration
  • typically uses a fixed resolution (e.g. 1920×1200 on many macOS setups - is applied for the whole macOS system, like mouse pointer, other windows from other applications etc. which leads to problems when using other apps while Minecraft is in such a fullscreen mode)
  • does not behave like macOS native fullscreen (Spaces)

Feature to solve this problem

Add a macOS-specific fullscreen rendering option, located in the Minecraft settings under full screen mode

1. Fn + F behavior (unchanged)

• No changes to current behavior
• Game enters fullscreen normally - macOS native fullscreen
• Rendering remains at full native resolution
• Works exactly as it does today with any macOS application

2. F11 behavior (new option - located in Minecraft settings unter full screen mode, where you can already choose between borderless/exclusive)

When pressing F11:

• Minecraft enters macOS native fullscreen mode instead of borderless mode or exclusive mode (Spaces / separate desktop - like when clicking full screen on a YouTube Video and it opens in macOS native fullscreen mode)
  • Same system behavior as other macOS fullscreen applications
  • Allows smooth switching between desktops (browser, Discord, etc.)
  • macOS display resolution/display scaling remains unchanged
• Additionally:
  • Apply a configurable render scaling factor → can be configured in the Minecraft graphics settings
    • e.g. 50%, 75%, 100%
  • This scales only Minecraft rendering
    • reduces internal render resolution
    • improves performance (especially with shaders and high DPI displays)