Unable to write file on mac app using the com.apple.security.files.user-selected.read-write entitlement

Question

Created Jul ’17

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I have created a mac app and I keep getting following error, "Deny file-write-create". I have added the

This is my entitlement file

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<dict>

<key>com.apple.security.app-sandbox</key>

<true/>

<key>com.apple.security.application-groups</key>

<string>XXXXXXXX</string>

<key>com.apple.security.files.user-selected.read-write</key>

<true/>

</dict>

</plist>

I keep getting "deny file-write-create" Application doesn't have the permissions to perform this action.

Any help would be greatly appreciated.

Thanks

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Answer 1

DTS Engineer OP

Apple

Jul ’17

It’s hard to say what’s going on here without more information about the place you’re trying to write to. The expected behaviour for the

com.apple.security.files.user-selected.read-write

entitlement is as follows:

Your app puts up a standard save panel (NSSavePanel)
The user choses a save location
As part of that process the OS punches a hole in your app’s sandbox to allow it to write to that location
Your app gets that URL from the save panel
Your app saves to that location

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