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4.3 Stars (39)
66 Downloads (This Week)
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Monolingual is a program for removing unnecessary language resources from Mac OS X.

Monolingual Web Site


User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Been using Monolingual for a long time and love its function. Am currently using version 1.7.2 on Mac OS X 10.11.2. However, since installing the 10.11.2 update to OS X Monolingual is no longer erasing the non-english lproj files in any of the Apps written by Apple. I haven't checked every app but App Store, Time Machine, Automator, Calculator, Calenday, Chess, Contacts and the others that I have checked all still have all of the non-english lproj files within the apps resources folder. It did clean the foreign languages out of non-Apple apps. Have run Monolingual several times and rebooted the machines but still those files exist. I hope that Apple has not taken security to the point to where Monolingual can no longer be used effectively.

    Posted 12/13/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    This is an update to my original posting. I'm continuing to have the same problem with 1.7.2. It does not run on my machine and I am forced to continue to download and use 1.6.7. The program boots, but will not run. Immediately after I enter my password to grant administrator authority to the program a screen pops up indicating that it "Failed to install helper utility". I have removed and reinstalled the program seven times. Each time I remove it using the App Cleaner program and reloaded it by downloading a fresh copy of the file from the website // . I love the program and it's ease of use, but I would like to make it functional again. It started having this problem as soon as I upgraded from 10.10.4 to 10.10.5 and it remains a problem now that I have El Capitan installed. Are there any suggestions how to fix this so that I can upgrade to the latest version?

    Posted 09/27/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Great program, simple, unobtrusive, does what it has to do very well, I recommended it to a lot of people. Now beta testing on el Capitan, in one installation it is working normally, the other I have to check.

    Posted 07/27/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Monolingual seems to be broken for Mavericks. It worked great on my older Mac Pro work computer which is on Lion, but I get the same "Monolingual is damaged and can't be opened. You should move it to the trash" error message on my personal Macbook Pro running Mavericks. It deleted 1.5GB of unneeded crap off of my work computer, and I need the space here. Please fix!

    Posted 07/20/2014
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    There are no instructions for this app. On 10.9.2 with version 1.5.10, I get an error message when I click on the icon: "'Monolingual' is damaged and cannot be opened. You should eject the disk image."

    Posted 07/08/2014
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Additional Project Details


French, Polish, Italian, English, Swedish, German, Japanese

Intended Audience

End Users/Desktop

User Interface

Cocoa (MacOS X)

Programming Language

C, Objective C



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