FINALLY! A brightness control for ALL my monitors. This actually works. Not sort of or maybe… It fully works. This was a $1.99 risk that paid off.I have three monitors (one iMac 27” Retina late 2015) plus two of those fancy expensive LG Ultrafine 5K displays they sell at the Apple Store. But guess what, you can only control brightness natively on the main display and the second monitor (hold CONTROL + F1 / F2). But if you go to a second external display (three total), or just want to control ALL of them simultaneously like a normal person, you’re out of luck. I even called Apple Support, spoke with Senrio technician: nope, it just don’t do that. Nevermind they sell an iMacPro now that can do up to FOUR external displays, but no way to control brightness except through System Prefs on each one. Seriously Apple??UNTIL NOW... Thank you Atlas Wegman! I can control all of my monitor’s brightness simultanoeusly with one control using this app. You can also de-select a monitor and it goes back to its preset brightness (I leave them all the way up in System Prefs, and use the app to turn them down).Great job!!

This was $2 well spent. :) My Macbook Air is hooked up to a Dell external monitor, and unfortunately the hardware brightness control on the latter doesn't dim as much as I'd like it to at night. This utility allows me to (1) dim both the Macbook Air and the Dell simultaneously [if I choose to do so], and (2) dim the screens far below what the hardware adjustments actually allow. The utility does not actually dim the backlight; instead, it dims the intensity of each pixel (by casting an overlay onto each display), and the effect is pretty comparable. Works perfectly on High Sierra. Definitely a great app!!!!

I’m a day trader and my eyes get fatigued about mid-day. I was getting severe headaches from it. I tried every free screen dimmer that was available and they all worked…but only on the main display. The other two were still pumping me full of toxic eye radiation! Heard about this while googling for a solution and just bit the bullet and paid the 2 bucks (seriously, so cheap!).It works. Dims all 3 montors at the same time to the same level. My eyes are still thanking me hours later. And listen, my setup is as kinky as it gets. I have one monitor plugged in via thunderbolt-to-hdmi as the last in the chain of thunderbolt devices. I have one plugged in direct to HDMI on the MacBook Pro Retina I use, and I have another one using a mini display port adapter. It works on all of them. Don’t hesitate. If you landed here, its because you need this app, and this app needs you. Buy. Be happy.

It’s a simple, but very effective way of dimming a non-Apple monitor (really any monitor). In my case I have been using 3rd party monitors for decades. This app provides a really handy way to dim a monitor without messing with your monitor’s brightness controls manually over and over again. I want to thank the developer for creating it and continuing to support it.