One of the problems I’ve run into through the years with Macs that have multiple displays connected is, simply put, brightness. Sometimes it’s a pain to get both screens in sync, brightness-wise, more so if one screen doesn’t come from Apple and has it’s own brightness controls. Here’s an inexpensive solution that works.
Dim The Screen, Scotty
Solving the screen dimming or brightness problem isn’t as easy as it looks. For example, many Macs, my new iMac Retina 5k display is an example, come with an option to adjust brightness automatically.
Apple’s idea of screen brightness is different than mine so I find myself adjust the screen’s brightness to match lighting and time of day.
That works acceptably for an iMac, and maybe even a MacBook notebook, but add a second screen to the mix and automatic brightness goes out the window.
Most external displays have their own brightness controls, and those, too need to be controlled as lighting and time of day change. Enter one ScreenDimmer app.
This unique app controls the screen brightness (or, dimming) of up to three screens connected to your Mac (two, if you’re using a MacBook or iMac and use the built-in screen).
The drop down ScreenDimmer controls let you control dimming on each connected display with a variety of configurations. Dimming goes all the way down to complete black, too; no floating ghosts in the screen image.
Even if your Mac does not have a connected external display you might find ScreenDimmer useful because it gives you more granular control over dimming and brightness than OS X’s built-in Display preferences. There’s no magic in ScreenDimmer. It simply places a layer over the Mac’s screen, and you control opacity from the Menubar. It even has keyboard shortcuts so you can make adjustments in the dimming (or brightness) without opening the app.