When installing JOSM on my mac, I'm seeing the error

"JOSM.app" is damaged and can't be opened. You should move it to the Trash.

alt text

I am downloading the "Mac OS X package" from the JOSM homepage and the download appears to be succeeding without problems. Is this download "damaged"?

asked 07 Apr '13, 22:57

Harry%20Wood's gravatar image

Harry Wood
accept rate: 14%

edited 11 Apr '17, 22:31

No it's not damaged.

This is a highly misleading error message coming from the Gatekeeper function of OS X (10.8 Mountain Lion onwards I think (?))

To get round this, temporarily disable Gatekeeper as follows:

  • open System Preferences and the 'Security & Privacy' options
  • Click the padlock at the bottom if it is locked
  • Set 'Allow applications downloaded from:' to 'Anywhere'.
  • Keep that open, but go back to your finder window
  • Open JOSM.app it should work this time ...although you still get:
  • "JOSM.app" is an application downloaded from the Internet. Are you sure you want to open it? -> Click 'Open'
  • Now re-enable gatekeeper back in the settings window. Put it back to the default "Mac App Store and identified developers"

You won't need to do this every time you run the app. It should open fine from now on (or until you need to update)

Thanks to user drnoble for his diary entry on this

permanent link

answered 07 Apr '13, 22:58

Harry%20Wood's gravatar image

Harry Wood
accept rate: 14%

edited 07 Apr '13, 23:15

Does it cost to be an "identified developer"?

(09 Apr '13, 08:02) superduck
(09 Apr '13, 10:00) gormo
Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here



Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:


question asked: 07 Apr '13, 22:57

question was seen: 13,631 times

last updated: 11 Apr '17, 22:31

powered by OSQA