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Dimmer is an application that helps give that extra detail to the brightness of your display.

By all means the brightness settings on Mac OS X are great but Dimmer allows that extra depth of brightness. This is a great application to use when you find the lowest display setting is too dark and the second lowest display setting is slightly too bright.

Dimmer was created and tested on a Macbook Pro running OS X 10.5.8 (Leopard). I am not sure specifically which versions Dimmer will work with apart from 10.5. 10.4 (Tiger) should be okay and 10.6 (Snow Leopard) shouldn't have any problems either. If you do find bugs then more...

What's New

Version 1.3:
  • Red shift has no been organised and is now optional
  • Updates are optional
  • Presets added
  • Multi-monitor support
  • Fading animations
  • Custom scroller orientation
  • Global Hotkeys (Leopard - Not sure about Snow Leopard)


Mac OS X 10.4 or later

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Dimmer User Discussion

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Mikofox Member IconReview+29

While I liked the sliders I had to uninstall it because the keyboard shortcuts interfered with my tab switching in Firefox and Safari.

Reply0 replies
Version 1.3
Moocan Member IconReview+11

Very good, simple and useful tool.
Work well and as expected.

Preset feature management is very useful to record different profile when you have a to move with your notebook.
Works well the same way on multi monitors.

Good for eyes !

Reply0 replies
Version 1.3
Macguy Member IconComment+1

This is a cool app but it would be better if it had a keyboard shortcut to increase or decrease the shade. The app does use 20 MBs of virtual memory and while this is relatively, it still would be a plus if it could be reduced at all.

Reply1 reply
Version 1.2
Ashley Byrom (Developer)


I'm currently creating the next build and keyboard shortcuts is what I'm working on now. There will be lots more features such as pre-sets, multi-monitor support etc. and I'm really looking forward to it. I'm hoping to get it out within the next week but I'm extremely busy at the moment. Dimmer will give you a notification when the new build is out.

As for memory, I am working my hardest to decrease it as best as I can, I can't give any promises yet but it is definitely on my todo list!

Hope you've enjoyed using Dimmer!

Moocan Member IconComment+11

So beautiful ... I love it.
Is it possible to control darkness on two monitors and not only principal one ?

Reply1 reply
Version 1.2
Ashley Byrom (Developer)

Thank you for your comments,

I am working on another version and that should be supporting multiple monitors. I am looking for BETA testers that can test out the multi-monitor support when the version is closer to release. If you're interested drop me an email, it would be appreciated.

Donations are also, kindly, appreciated!

Killsapo Member IconComment+5

[FYI however, you can fine-tune brightness settings on yr mac, by pressing alt+shift+(brightness control key): this gives you ¼ unit increments. it works with volume controls, too!]

Reply2 replies
Version 1.2
Ashley Byrom (Developer)

Not for me running 10.5.8 Macbook Pro? The volume works like that though...

Is this new in Snow Leopard?


mmm maybe... I've been aware of this trick for quite a while, but I've never used myself (happy w/the full increments I guess ;))

im on snow leo now, maybe someone else could report on previous versions!

Fariborz Member IconComment+286

To the developer/Macupdate: the "f" letter of "shift" in "What's New" on this page is missing. You may want to correct this. Thanks.

Reply2 replies
Version 1.2
Ashley Byrom (Developer)


Edited & submitted, let's hope it comes off there ASAP :)



Thanks. Now it's much better. ;-)

Dr.-Girlfriend Member IconReview+517

Dimmer, first impressions:

Dimmer switch goes left to right (right equals more dim), which seems counter-intuitive; I think it should go left to apply dimness, right to brighten... or even better, up to brighten and down to dim.

Red shift - no percentage indicator or color temp indicator, just an unmarked blue blob on a line which you toggle from left to right.

Red shift - gets more intense even when one is just moving the dimmer arrow; thus the screen becomes more red as well as more dim even though you may just want to adjust the brightness, not the color temperature. This gives less precise control. By default, these settings should move independently of each other; perhaps a check box could be added for users who want to adjust them together.

"About Dimmer" is inexplicably placed in the middle of the app controls between "dim" and "red shift" instead of at the top of the menu like other Mac apps. Dim and red shift controls should be right next to each other.

Dimmer bar should show color temperature instead of percentage, imho. 60% brightness setting is useless if you don't remember what color temp you're using. (Ex. markers could be placed at standard areas like 6500K, 5000K, etc.) Red Shift should also have markers indicating how red (temperature-wise).

In a later version, perhaps the dev could implement quick key shortcuts to switch between the brightness of "6500K" to a more soothing 5000K when one switches from watching a movie to reading for example.

User favorite settings should be save-able and one-clickable: ex "movie" setting, "reading" setting, etc.

Dimmer is using 23MB of real memory on my system (MacPro running Snow Leopard); not horrible, but not great for such a little app.

"Welcome to dimmer" is an unnecessary menu item - bulks up control panel area.

Also, "Website" doesn't need it's own menu line - link to the website should be in the "About" section.

One way that it's better than f.lux is that it doesn't pound Little Snitch with requests to call out to google maps for your location in order to adjust and set the color temp.

Dimmer works nicely with Isolator.

There are other apps in this category, but none that have hit the sweet spot (for me anyway) in terms of precise brightness and temperature control. Dimmer is a nice first effort. I look forward to it's continued development and will be happy to donate after it matures a bit.

Reply1 reply
Version 1.2
Ashley Byrom (Developer)

Hi, Dr. Girlfriend.

Firstly, thank you for your views and opinions on Dimmer. I value your positive comments and I have taken every one of your suggestions onboard. Hopefully in this reply I will address your issues and let you know what to expect SOON in version 1.3. I've made a list of all your suggestions and I will add suggestions from others to that list as I go on.

When the concept of Dimmer arose the key point was that it would make the brightness of the screen more customisable however add minimum complexity to the task. The idea is that users can achieve their brightness setting within a few seconds and within a minimum of three clicks.

The apple settings in place are extremely simple and can be used by almost anyone, regardless of their knowledge. I'd like to be able to stick to that and this is a concern when adding 'Colour temperature' instead of 'Brightness'. 'Brightness' is a concept people understand a lot easier than colour temperature and I wouldn't want to confuse users that don't understand the concept of colour temperature fully.

That said, your suggestion is in no way bad. Having just read your review I haven't implemented any of your suggestions yet but when I plan version 1.3 maybe I will add profiles to dimmer such as "Simple" and "Complex" so the user gets a choice of how advanced Dimmer is. Because of the complexity of the “complex” setting I plan to add a window that will allow you to change settings instead of doing it in the menu bar as I don't want to make it ‘crammed'.

The keyboard shortcuts and extra, unneeded menu items should definitely be sorted by the next release.

Now, for the Red Shift feature.

The Red shift feature is new, version 1.2 was it's first appearance and it only appeared there based on a request from a user because they liked how similar apps performed this 'tint' feature. When I implemented Red Shift it was in no way meant to resemble a colour temperature changer (as I said, sticking to the ease of the application). Whether I will implement this is something I haven't decided yet and I will consider it and try to implement it without potentially confusing others but there are no definite plans to change the ‘tint' action to a complete colour temperature change.

I hope I've addressed your concerns, if you have any further questions or improvements please feel free to either reply to this or email me.


Electricdreams Member IconReview+11

Works perfectly on iMac10,1 with 10.6.4

No complaints.

Job well done Ashley Byrom!

Reply0 replies
Version 1.1
There are no Ratings for this App yet.
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Current Version (1.x)


Downloads 23,779
Version Downloads 18,725
Type Utilities / System
License Free
Date 06 Sep 2010
Platform OS X / Intel 32
Price Free
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