SwitchResX

SwitchResX is a powerful and popular utility application for macOS that gives users comprehensive, low-level control over their Mac's display settings, resolutions, and monitor arrangements that go far beyond what is available in the standard macOS System Settings.

It is particularly valued by professionals, gamers, and users dealing with non-standard or older displays.

Key Features of SwitchResX

SwitchResX offers granular control over almost every aspect of display configuration:

• Custom Resolution Control: This is the core feature. Users can create, manage, and activate completely custom screen resolutions, pixel depths, and display timings, including resolutions that macOS does not natively support (e.g., HiDPI/Retina resolutions on unsupported displays, or 4K/5K resolutions on older Macs).

• Refresh Rate Management: Allows users to define custom refresh rates (Hz) for their monitors, which is critical for gamers or video editors looking to optimize screen performance (e.g., forcing a 120Hz mode if a monitor supports it but macOS doesn't list it).

• Display Presets: Save multiple combinations of screen resolution, color depth, and refresh rate as presets, and switch between them instantly using hotkeys or the menu bar icon.

• Application Linking: You can link specific resolutions to specific applications. For example, you can force your external display to switch to $1920 \times 1080$ when launching a video game and switch back to $4K$ when the game quits.

• Advanced Features (EDID): Allows access and editing of the EDID (Extended Display Identification Data) of connected monitors. This can be used to fix issues with Macs failing to recognize a monitor's capabilities (like supported resolutions or refresh rates).

• Monitor Sleep Control: Offers advanced options for managing how monitors behave when the system sleeps or wakes.

Note: SwitchResX often requires users to be cautious, as setting incorrect or unsupported resolutions can lead to a blank screen, though the application typically includes safeguard features to revert settings.