CODEWITHSUNDEEP
macoscocoansdocumentuti
Alexander
Alexander

Reputation: 63369

Exported UTI not being picked up by macOS

I'm trying to export a UTI in my application, but macOS (10.3.2) is not picking it up. I've replicated my issue in a smaller project. Here's the relevant part of info.plist:

<key>UTExportedTypeDeclarations</key>
<array>
    <dict>
        <key>UTTypeConformsTo</key>
        <array>
            <string>public.plain-text</string>
        </array>
        <key>UTTypeDescription</key>
        <string>Demo of custom file support</string>
        <key>UTTypeIconFile</key>
        <string>File-512</string>
        <key>UTTypeIdentifier</key>
        <string>am.customfiledemo.demotxt</string>
        <key>UTTypeTagSpecification</key>
        <dict>
            <key>public.filename-extension</key>
            <array>
                <string>demotxt</string>
            </array>
            <array/>
        </dict>
    </dict>
</array>

I've tried rebooting, and even rebuilding the launch services database, to no effect:

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local -domain ststem -domain user -v

When I check my file's UTI with

mdls -name kMDItemContentType -name kMDItemContentTypeTree file.demotxt

I get a dynamic (dyn.*) UTI, rather than am.customfiledemo.demotxt

kMDItemContentType                 = "dyn.ah62d4rv4ge80k3prr74hu7a"
kMDItemContentTypeTree             = (
    "dyn.ah62d4rv4ge80k3prr74hu7a",
    "public.data",
    "public.item"
)

Upvotes: 4

Views: 923

Answers (1)

Alexander
Alexander

Reputation: 63369

Make the UTI conform to public.data, or com.apple.package:

Although a custom UTI can conform to any UTI, public.data or com.apple.package must be at the root of the conformance hierarchy for all custom UTIs that are file formats (such as documents); otherwise, the system can’t tell if an item on disk has that UTI.

- Uniform Type Identifiers Overview, Declaring New Uniform Type Identifiers, Recommendations for Declaring new Uniform Type Identifiers

Upvotes: 2

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