[Bug] [mac-osx] .md files unable to open from Finder in Ferrite 2.7

[sfrankiel]

Description

Right Click -> Open With Ferrite or associating "*.md" to open with Ferrate and double-clicking fails in the finder.

Environment

• OS: Mac OSX 15.6.1 (Sequoia)
• Ferrite version: 0.2.7
• Rust version: rustc 1.93.1 (01f6ddf75 2026-02-11) (Homebrew)
• Installation method: pre-built binary 0.2.7 / built from source (v0.2.6 issue exists build from source

Steps to Reproduce

1. Right Click .md file select 'Open With...' and seelct Ferrite
2. See error

Expected Behavior

*.md files would open in Ferrite from double click/Open With commands

Actual Behavior

File doesn't open, Error message is generated.

Screenshots

Additional Context

From 0.2.6 source investigation:

Root cause: assets/macos/info_plist_ext.xml declares CFBundleDocumentTypes with net.daringfireball.markdown in LSItemContentTypes, but is missing a UTImportedTypeDeclarations block. Without it, the app bundle contains no definition for that UTI, so macOS cannot complete the file-type handoff and throws the "cannot open files in the Markdown Document format" error.

Fix: Add a UTImportedTypeDeclarations entry to assets/macos/info_plist_ext.xml defining net.daringfireball.markdown with public.plain-text conformance and the relevant file extensions (md, markdown, mdown, mkd, mkdn). Rebuild the .app bundle with cargo bundle --release to verify.

[OlaProeis]

Hi @sfrankiel,

Thank you for this excellent bug report! the missing UTImportedTypeDeclarations block was indeed preventing macOS from completing the file-type handoff for markdown files.

I've implemented the fix in commit 9704f0c which adds the required UTImportedTypeDeclarations entry to assets/macos/info_plist_ext.xml. This properly declares the net.daringfireball.markdown UTI with conformance to public.plain-text and all the relevant file extensions.

To verify the fix:

Rebuild the .app bundle: cargo bundle --release
Replace the existing Ferrite.app in your Applications folder
Right-click a .md file → "Open With" → Ferrite (or set Ferrite as the default)
This fix is now scheduled for v0.2.8. The CHANGELOG and ROADMAP have been updated accordingly.

Thanks again for the detailed report, it made the fix straightforward!