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iUPX is an UPX (the Ultimate Packer for eXecutables) GUI for Mac OS X.

What's New

Version 1.2:
  • Added errors badge in dock icon (for Mac OS X 10.5 users only)
  • Added progress bar in dock icon
  • Added Growl notifications
  • Added Credits
  • Fixed bug with UPX progress bar detection
  • Changed individual progress bar to an unique progress bar
  • Changed indeterminate progress for decompressing mode to % progress


Mac OS X 10.4.11 or later

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iUPX User Discussion

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Phaleron Member IconComment+97

Description: "iUPX is an UPX"

That's nice, but unfortunately it tells me nothing about the product.

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Version 1.2
JetFireDX Member IconReview+34

Nice. Compression rates vary greatly as I would expect from app to app. My BlitzMax debug builds of applications get a huge improvement in size, while others save a few megs here or there. I did not notice any slowing of loading applications once they were compressed and all have been behaving normally. (I did Mail.app to test as I have it running all the time.)

I could see this being useful in tandem with trim the fat and monolingual or a similar tool to save every last bit of space on a bootable backup or disc.

One feature I'd like to see is a report after an app is compressed of how much space was saved.

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Version 1.2
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> 4 1


Current Version (1.x)


Downloads 2,394
Version Downloads 2,110
License Free
Date 07 Mar 2009
Platform OS X / PPC 32 / Intel 32
Price Free