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App Tamer tames your processor-monopolizing apps and keeps them from chewing up excessive CPU time and battery life. Powered by a unique AutoStop feature, App Tamer stops each application when you switch away from it -- when you return to that app, it restarts automatically!

App Tamer is built around an attractive and clear user interface, designed for managing all your running applications with minimum distraction or frustration. With helpful displays, you can monitor the average percentage of your processor(s) being used by each app, or access a graphical history or your CPU usage. Easily enable AutoStop for any more...

What's New

Version 2.0.3:
  • When a process is limited to a certain amount of CPU usage, that limit is now displayed next to the process' name in App Tamer's window.
  • Corrected an issue that could cause App Tamer to incorrectly limit the CPU usage of an application in certain situations.
  • Fixed a problem where App Tamer could cause applications to hang when restarting or shutting down your more...

Requirements

OS X 10.7 or later

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App Tamer User Discussion

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Most Helpful Reviews...

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Users like me who afford to buy a new Mac once in a blue moon are always looking for new utilities that help their good old Mac keep going in a fast changing computer world. While a few years ago a shiny 2,1 GHz Intel Core 2 Duo could satisfy the more...

3 people found this review helpful
Version 2.0
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MaxWilders Member IconComment+43
MaxWilders
+0

Is it just me or isn't there a try-before-buy version?

Reply1 reply
Version 2.0.3
St. Clair Software (Developer)
+1

The download from our web site (and at MacUpdate) is try-before-you-buy. It runs for 15 days completely unfettered. After that it'll start pestering you to purchase a license, but will still run, though it eventually limits you to no more than 5 minutes and then quits.

Zippyzap Member IconReview-1
Zippyzap
+0

I rarely make comments on applications whether I think they are good or bad. Recently, I've had to be more mobile with my MacBook Pro and my battery isn't the greatest.

While the application works, it was using 17% CPU when all my other apps were using less than 3%. I found my battery draining faster with this app running than without it. Defeats the purpose of the app.

I think it's the placebo effect. The app claims to limit energy use, and shows lots of stats on how it's doing that, but it in and of itself is using far more than what it's saving.

Your mileage may vary.

Reply2 replies
Version 2.0.3
MacUpdate_User_44025b4b72b68c23a6a73ee477bbc62e
+1

Savings depends entirely on what you're running and whether those apps are consuming CPU while they're in the background. As for App Tamer's on CPU usage, it does use some itself when you've got its window open (all those graphics and continuously monitoring processes cost cycles) but when the window's closed and it's just doing its job, it should consume more than a couple percent itself.

St. Clair Software (Developer)
+0

Whoops - in my previous post, that last line should be "when the window's closed and it's just doing its job, it SHOULDN'T consume more than a couple percent itself."

tjekov37 Member IconReview+45
tjekov37
+1

But .....Mavericks sometimes freezes. Doc panel freezes in minutes. Computer becomes unusable.

Reply1 reply
Version 2.0.2
Derekcurrie
+0

Been there. Thus arrives version 2.0.3 to save the day.

tjekov37 Member IconReview+45
tjekov37
+1

I love this app :-)

Reply0 replies
Version 2.0.2
Stickman67 Member IconReview+162
Stickman67
+2

I've been using this application now for a number of years. I've tried others, out of curiosity, and always come back to App Tamer. And the latest version simply justifies my choice to stick with it.

Stability has never been an issue for me with App Tamer. It's customisable enough for me to tweak it to my satisfaction, and after that I can pretty much forget that it's there. Sure, I glance up at the menu bar now and again when things are getting a bit slow on my increasingly elderly MacBook Pro, and often it is because a CPU-intensive operation is taking place, but generally App Tamer sits quietly doing its job while I sit quietly doing mine.

I recommended it here about three years ago. I'm happy to continue to recommend it here now.

Reply0 replies
Version 2.0.1
Djefis Member IconReview+156
Djefis
+1

I believe that this application is decisive for the use of the laptop. When it is essential to reduce battery consumption.

Reply0 replies
Version 2.0.1
Surfspirit Member IconComment+442
Surfspirit
+2

Well, I don't understand why the developer makes an app that is most useful on old macs incompatible with older OS version, like Snow Leopard. Oh well.

Reply1 reply
Version 2.0
B. Jefferson Le Blanc
+2

You can still get version 1.3.2 for OS X 10.5 and 6 on the developer's site.

Fariborz Member IconReview+286
Fariborz
+3

Users like me who afford to buy a new Mac once in a blue moon are always looking for new utilities that help their good old Mac keep going in a fast changing computer world. While a few years ago a shiny 2,1 GHz Intel Core 2 Duo could satisfy the wildest needs of a Mac user it's now hardly of any interest to a 10 year old school student who just considers it as an obsolete piece of furniture! Let’s face it; unless you are a professional user who earns a living on a computer you could hardly justify the purchase of a new Mac every two or three years. Fortunately there are developers out there who come up to our help with exceptional ideas that give our old Macs a new life for the price of a pizza! App Tamer by St. Clair Software has been my favorite program since its first release. It allows me to run several CPU hungry applications on my 2006 iMac that would otherwise be a core. The new version benefits from a very clean interface and allows me to determine on the spot how to dedicate limited resources to applications that will otherwise gobble up all my resources. It does its job with such elegance and transparency that I have the sensation of using a new Mac! Thanks to this utility I can still use efficiently my obsolete iMac and enjoy working simultaneously with several open applications that would otherwise break the back of my poor old companion! Fariborz AMIRSHAHI - Verona (Italy)

Reply0 replies
Version 2.0
Tommy_Gun Member IconComment+53
Tommy_Gun
+1

Not sure if this app is needed for OS X 10.9 - I mean, when you hide an app in Mavericks, it automatically doesn't use any cpu load (if supported).

Reply2 replies
Version 2.0
St. Clair Software (Developer)
+2

As B. Jefferson Le Blanc said below, Mavericks' App Nap feature requires that you hide an application's windows before it slows applications down. If you routinely do that, you don't need App Tamer to manage those apps.

Mavericks' App Nap also doesn't slow down background processes like Time Machine and Spotlight - it only works with windowed applications. App Tamer can manage them and offers you more control over what it's doing.

tjekov37
+0

from site: What About App Nap in Mavericks?
Apple knows a good thing when they see it. Mac OS 10.9 Mavericks includes App Nap, a feature that 's similar to App Tamer. But to activate it you have to hide or completely cover an application's windows, making it not-so-automatic. And App Nap doesn't work at all with behind-the-scenes applications like Spotlight and Time Machine.

App Tamer gives you control. Let's say Spotlight is overheating your Mac and making the fans rev up like a fighter jet. Just select it and tell App Tamer to keep its CPU usage below 25% - done!

ylluminate Member IconComment+286
ylluminate
+0

This app would be nice if it didn't use so much of the CPU cycles itself. I've seen it consistently ticking in at about 100% on one of my cores after starting the trial and that is about as much as it is saving... So pretty much a wash so far.

Reply4 replies
Version 2.0
St. Clair Software (Developer)
+2

Whoa - there's something very wrong there - App Tamer should use 1-2% CPU when its window isn't showing. Please contact us at support@stclairsoft.com so we can figure out what's going wrong.

- Jon

Tommy_Gun
+1

1-2% when in idle is a lot imo - it should use 0% when idling.

B. Jefferson Le Blanc
+1

@ Tommy_Gun: And you know this how? AppTamer has to run in the background in order to monitor the system. It's never really idle, even if it's not controlling any apps. Mavericks may idle apps when they're hidden, but many people don't hide their apps - they don't even know you can do so. So if you're running and jumping between multiple applications, they can easily hog resources and slow down your system. AppTamer adds a level of control beyond what the system provides. As with any app, however, if you don't need it, don't use it. It's that simple.

St. Clair Software (Developer)
+2

Version 2.0.1 fixes this problem.

user icon+0
Oldmid
Version 2.0.3
user icon+72
Spike-James
Version 2.0.3
user icon+719
Derekcurrie
Version 2.0.3
user icon+2
Ededed
Version 2.0.2
user icon+60
Version 2.0.2
user icon+34
AlexisDhooge
Version 2.0.2
user icon+9
Widber
Version 2.0.1
user icon+222
St. Clair Software
Version 2.0
user icon+0
mhermansson
Version 1.3.2
user icon+9
Widber
Version 1.3.2
> 4 185

Ratings

Overall
(185)
Current Version (2.x)
(14)

Details

Downloads 49,854
Version Downloads 1,144
Type Utilities / System
License Shareware
Date 13 Jun 2014
Platform OS X / Intel 32
Price $14.95
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