![]() To get one, click on "Report a Problem" on the app page in the App Store and select "Request a refund". Sure! The App Store provides refunds in the first 14 days after a purchase. To change the real brightness of the monitor, a macOS app needs to use Display Data Channel (DDC) which is not allowed on the App Store.įor that functionality, you'll need to use Lunar Pro which does support DDC and can only be downloaded outside the App Store.Ĭheck the comparison table below to see what features Gamma Dimmer has compared to the Lunar. Moving the GammaDimmer slider or pressing the Fn+F1/F2 hotkeys will reapply the dimming,Ĭan Gamma Dimmer control the real brightness of the monitor? GammaDimmer tries to reapply the dimming continuously for a few seconds after wake to work around this, but in some cases it may not work. If you don't need to dim displays that require overlays (DisplayLink, Luna Display, Sidecar, Airplay etc.) then make sure the following setting is disabled (unchecked) to take full advantage of the Gamma Dimming functionality:īecause of how macOS works, the dimming can be unapplied by the system after waking the device from sleep. Only the Gamma Dimming method works on fullscreen windows. ![]() Sometimes, restarting the computer or disabling mirroring can also fix the issue, but in case nothing works, please contact us here.īecause of a macOS limitation, App Store apps are not allowed to place dark overlays above fullscreen windows. There are cases where not even the dark overlay works (some mirroring setups, virtual displays etc.). (note that overlays are more limited and can't be applied to fullscreen windows) To force using a Dark Overlay instead of Gamma, enable the Use dark overlay instead of Gamma dimming setting and restart the app. Some types of monitors don't have support for Gamma dimming (DisplayLink, Luna Display, Sidecar, Airplay etc.). If you want to keep using those apps, the best choice is to switch Gamma Dimmer to Overlay mode. Will try to override each other's changes. If both Gamma Dimmer and one of these apps are used at the same time, the Gamma tables might be set to invalid values as the apps This should be a completely normal use case, and the call should simply do nothing if the gamma tables are already at their default values.īut for unknown reasons, this API call will sometimes set all RGB Gamma tables to 0 and all colors will show up as black. The bug is usually triggered when the app tries to reset the gamma tables to their default values by calling the CGDisplayRestoreColorSyncSettings() system method. This usually happens when custom color profiles are used, but it was reported on some default monitor profiles as well. Switch to Overlay mode to disable Gamma changes. ![]() Use a default color profile in System Preferences -> Displays.There's no complete fix for this as it is a macOS bug, but you can lower the chances of it appearing using the following steps: The 2 most common causes for this issue are Color Profiles and other Gamma-altering apps.īecause of a macOS bug in the Gamma API, your screen can go black and stay that way until you disconnect and reconnect the monitor. Usually this can be fixed easily by reconnecting the monitors or restarting the computer. Don't worry, Gamma Dimmer can't make permanent changes to your displays.
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