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Editorial Team
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Asked: 2026-05-24T11:27:01+00:00

we are making an Application for OS X, however, when the .app is copied

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we are making an Application for OS X, however, when the .app is copied on another MAC, we have problems with reading and writing files

on one MAC, everything works great from the start…
the other one will not write certain files and another 2mac will not write certain different files

if i go to show application contents and wants to edit the file by myself, i get a writing permission denied

how to distribute an MAC application so there are no such issues? so all files can be read and write by the current user

does there have to be some authorization or code sign, or smth. different in this form, in addition to normal code?

thank you

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1 Answer

  1. Editorial Team

    It sounds like your application tries to write files within its own application bundle. The correct solution here is: DON’T DO THAT! The only time your application bundle should be written to is when it’s installed or updated.

    Files that the application needs to write to should be stored in the user’s home folder, generally under ~/Library. See this note in Apple’s dev docs.

    • Preference and settings files in ~/Library/Preferences/<appbundleid>.plist; use NSUserDefaults.
    • Data the app manages for the user in ~/Library/Application Support/<appname> (the docs say to use the bundleid, but everyone — Apple included — uses the app name instead).
    • Cache files in ~/Library/Caches/<appbundleid>.
    • Temp files, use NSTemporaryDirectory
    • If you need to share settings & files between users, that should generally go in /Library/Application Support/<appname>, except that you really shouldn’t be doing that at all.
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