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Houdini is a simply designed app to let you take full advantage of Mac OS X's "hidden folder" and "hidden file" ability. It allows you to create, access, move, reveal or delete hidden folders and files.


  • Full mastery of hidden files in Mac OS X.
  • The ability to toggle the visibility of hidden files with the "Toggle File Visibility" button
  • The ability to browse hidden files with the "Browse Hidden Files" button
  • Use keyboard shortcuts to toggle hidden files
  • Create new hidden folders and drag files into them via Houdini
  • Open hidden files through Houdini more...

What's New

Version 1.0 (dev claims version 3.0.2):
  • Snow Leopard now supported.


Mac OS X 10.4 or later

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Houdini User Discussion

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idlewild Member IconComment+0

I'm getting a crash when I run Houdini 1.0; any idea when you'll have this compatible with Lion? This software is really useful, thanks for creating it!

Reply0 replies
Version 1.0
Negritude Member IconComment+1082

FYI, this app is a universal Intel/PPC binary.

Reply0 replies
Version 1.0
smedinar Member IconReview+0

I loved this app because everytime i want to open some flash memory and i delete a file it goes to a .Trashes file (which is hidden) but the deleted file stays there so i can't permanently delete it because of the 'hidden' issue only in a PC... which I hate (to depend on a PC) The problem in my case was that I could see the hidden file but i couldn't delete it, hope you can help me with this problem. Ty!! :))

Reply0 replies
Version 1.0
Beige Member IconComment+178

you might want to change the name of this software. Houdini is a well known 3D program and it's at version 11 (sidefx.com). If this gets popular, you'll probably be getting a letter from some lawyers.

Reply1 reply
Version 1.0

There are many Houdini’s around, of all sorts and kinds. The lawyers of each of them will have a serious job.

cmotdibbler Member IconComment+33

I was just looking for an app like this for my new MBP. I wanted to make an easy-to-find (yet hidden) file with my contact info in case the machine gets stolen and the thief takes it in for reformatting. Hardly foolproof and there are many other sophisticated methods but thieves are not always so bright. This app made it easy to create a hidden folder.

Reply0 replies
Version 1.0
Ausfahrt Member IconComment+0

On 10.6.4, iMac, Toggle File Visibility returns an error every time: AppleScript Error: The domain/default pair of (com.apple.Finder, AppleShowAllFiles) does not exist (1)
Also, when I try to reveal any folder, it says "An error occurred: The file you selected is already visible", when clearly from finder it is not. Tested on usr and iPod_Control.
Basically, I haven't seen anything that this program can do correctly. Am I doing something wrong? It wouldn't have five stars if it doesn't work at all.

Reply3 replies
Version 3.0.1

I also have this error on my new Macbook pro but not on my iMac.
Really dissapointing, because I really needed it on the macbook.

Can anybody help ?

Elementninety3 (Developer)

Sorry, the version right now doesn't support Snow Leopard. I'm working on that, it should be available shortly.


I am getting an AppleScript error when trying to hide folders saying file wasn't found (-43).
I'm guessing Snow Leopard still isn't fully supported. Any idea when it will be coming?

Grlgeek Member IconReview+1

This app saved me time and a reboot. I kept getting a "A copy of Firefox is already open" messages after a hang and force quit, though the application didn't show up in the list of what was running. A Google search told me which hidden profile file was creating the problem, but I didn't really want to switch hidden file view on for the entire machine from the terminal. Houdini let me find and delete the file and get my browser back up and running without rebooting the machine. Thank you, thank you, thank you! (The machine is running Snow Leopard, and the download provided here worked just fine.)

Reply0 replies
Version 3.0.1
Dct Member IconReview+15

Great app. My antivirus software found a virus in a hidden virtual memory directory and was unable to quarantine the file.

I was about to go into Terminal to find the culprit when I thought, there must be "an app for that" and I found this little jewel, and FREE at that.

Problem solved, and my antivirus software and system security is happy again. Thank you to the developer!

Reply0 replies
Version 3.0.1
Maclover1.1 Member IconComment+742

I wonder if people who do not back up actually brush their teeth ?!

Reply0 replies
Version 3.0.1
Xenophile Member IconComment+694

PPC version?

Reply0 replies
Version 3.0.1
user icon+0
Version 1.0
user icon+0
Version 1.0
> 4 7


Current Version (1.x)


Downloads 270,162
Version Downloads 195,347
License Free
Date 18 Jan 2011
Platform OS X / PPC 32 / Intel 32
Price Free
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