MacOS – Icon associated with extension

file extensionsiconmacos

I'm running Mountain Lion, and my question is how to "attach" an icon to an extension? For example, I want all .adm files has an icon like on the picture below. Unfortunately all I can is just attach an icon to proper file, not to all files that has such extension. Thus I want .adm extension has their own icon. .adm is opening in TextEdit, so please don't suggest me to open it in right app. Thank you in advance! enter image description here

Best Answer

See this detailed answer for "How to set an icon for a file type on Mac?" on superuser.com.

In this case, you need to update TextEdit's resources and plist to get it to use your custom icon for a file type it does not know about. The LaunchServices database also needs to be updated for the changes to be seen.

Here's a small snippet from that answer (bold emphasis mine):

Icons for file types are handled by Launch Services (the service determining, among other things, which application handles a file type). The file icon is always provided by the application handling opening a file by default. This way, e.g. Preview provides PDF icons by default, and PNG icons, but if you change all PNG files to open using Pixelmator instead, these files get a Pixelmator-style icon afterwards.

What you need to do is add your file type definition to the application that opens it by default, or create your own "dummy" application for the file type.

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A somewhat dangerous solution is this, from the commandline:

find . -type f ! -regex '.*/[ -.0-~]*' -exec rm {} +

Replace the lone . with the name of the top directory if you haven't changed to the relevant directory first. To be safe, however try first the shorter command

find . -type f ! -regex '.*/[ -.0-~]*'

and ensure that it only lists files you wish to delete. The regular expression (regexp, or regex) here will match any pathname that ends in a slash followed by any combination of printable ASCII characters excluding /, the space characters being the first such and ~ the last, while . and 0 surround / in the ASCII sequence.

One caveat among many: I don't know for sure if your current locale might change the collating sequence of characters, and hence perhaps change the meaning of the regexp. I don't think it does, but if it does, running the commands as

LC_COLLATE=C find …

should remove the danger.

Yet another caveat: Please ensure you have a backup before you try this. I will not take the blame for any loss of data if you get it wrong. The commandline is a great tool for shooting yourself in the foot! Sometimes just a misplaced space can spell disaster. (In this case, for example, missing the single space after the left bracket is deadly.)

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I've got several contacts that are offline in iMessage and they have gone through all the troubleshooting steps.

Everything points to this being a service disruption as opposed to something you or your contact has done wrong.

enter image description here

http://www.apple.com/support/systemstatus/

Best Answer

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