MacDown 3000 Files

MacDown 3000 is a modern, open-source Markdown editor for macOS.

This release brings a working Quick Look extension for Markdown files, anchor-link navigation via slug-based heading IDs, a live selection character/word count, a new GitHub Dark editor theme, safer file handling on remote and network volumes, and a wide range of fixes to toolbar behavior, preview rendering, table layout, and localized preference panes.

Added

• Add localized selection count strings to all locale files (#452, [#501]) -- thanks @Telamonster for the report!
• Wire Quick Look extension into Xcode build (#284, [#477]) -- thanks @caius for the report!
• Add GitHub Dark Default editor theme (#465) -- thanks @sks3691 for the contribution!
• Add editor invisible character toggle (#43, [#462]) -- thanks @yusufm for the contribution!
• Add File menu autosave toggle (#301, [#459]) -- thanks @Xylopyrographer for the report! thanks @yusufm for the contribution!
• Add insert table toolbar action (#278, [#420]) -- thanks @rcuisnier for the report! thanks @yusufm for the contribution!
• Add Selection character/word count (#452, [#460]) -- thanks @Telamonster for the report!
• Persist preview-only startup mode (#383) -- thanks @yusufm for the contribution!
• Emit slug-based heading IDs for anchor link navigation (#429, [#430]) -- thanks @falcon-enoc for the report and the contribution!

Changed

• Dynamic preferences pane sizing for localized strings (#397, [#481]) -- thanks @rcuisnier for the report!
• Color HTML in default editor themes (#443, [#458]) -- thanks @gregwillits for the report!
• Support uppercase task list checkboxes (#369, [#410]) -- thanks @gino-santerre-telus for the report! thanks @yusufm for the contribution!
• Hide unparsable YAML front matter (#307, [#413]) -- thanks @yusufm for the contribution!
• Make the toolbar fully delegate-driven so Flexible Space can be dropped (#313, [#473]) -- thanks @gregwillits for the report!
• Extend wide-table horizontal scrolling to all themes (screen only) (#432, [#468]) -- thanks @dafi for the report!
• Widen HTML preferences pane to fit theme controls (#397, [#467]) -- thanks @rcuisnier for the report!
• Sort editor theme and rendering CSS preference menus (#404)
• Improve render-path responsiveness (#388) -- thanks @yusufm for the contribution!

Fixed

• Fix Quick Look extension entitlements stripped by release signing (#284, [#494]) -- thanks @caius for the report!
• Fix toolbar buttons not dispatching when editor has focus (#278, [#496]) -- thanks @rcuisnier for the report!
• Fix checkbox label clipping in localized preference panes (#397, [#498]) -- thanks @rcuisnier for the report!
• Force toolbar redraw after preference pane switch (#500)
• Bypass atomic safe-save on remote volumes to prevent spurious save conflicts and the "does not support permanent version storage" prompt on SSHFS and similar mounts (#371, [#502]) -- thanks @gurple for the report!
• Harden file watching against transient paths and remote volumes (#478, [#492])
• Fix Insert Table toolbar regression: button now works regardless of which pane has focus, repeated clicks no longer nest tables (#278, [#483]) -- thanks @rcuisnier for the report!
• Fix crash on empty Markdown headings from slug-based heading IDs (#479, [#482]) -- thanks @Telamonster for the report!
• Skip file watchers on remote volumes (#371, [#424]) -- thanks @gurple for the report! thanks @yusufm for the contribution!
• Re-highlight editor after preview checkbox toggle (#376, [#480])
• Fix blank preview for documents with execute bit set (#431, [#405], [#454]) -- thanks @maskedspitz and @b2sc for the reports!
• Never use the document file as the preview base URL (#405, [#431], [#456]) -- thanks @b2sc and @maskedspitz for the reports!
• Normalize CRLF line endings on file load (#382, [#398]) -- thanks @Ariaflux for the report!
• Cache-bust style/theme CSS on preview reload (#318, [#474]) -- thanks @gregwillits for the report!
• Restore natural table width and horizontal scrolling (#432, [#440]) -- thanks @dafi for the report! thanks @samqbush for the contribution!
• Keep editor and preview panes in sync on large files (#436, [#464]) -- thanks @KingMob for the report!
• Honor Sync Panes toggle mid-session (#441, [#463]) -- thanks @gregwillits for the report!
• Clear editor highlighting on reload (#378, [#415]) -- thanks @yusufm for the contribution!
• Re-initialize task list handlers after DOM replacement (#376, [#400])
• Strip grey background from printed output (#387, [#403]) -- thanks @richb-hanover for the report!
• Preserve custom Prism theme filename case (#315, [#416]) -- thanks @gregwillits for the report! thanks @yusufm for the contribution!
• Mirror drag-collapse ratio on pane swap (#380, [#414]) -- thanks @yusufm for the contribution!
• Fix preference pane layout for localized text wrapping (#397, [#461]) -- thanks @rcuisnier for the report!
• Fix Settings panel layout clipping and field overlap (#397, [#399]) -- thanks @rcuisnier for the report!
• Fix EXC_BAD_ACCESS when clicking grouped toolbar buttons (#393) -- thanks @yusufm for the contribution!
• Guard nil-group and out-of-bounds index in grouped toolbar item selection (#394, [#396])
• Fix entitlements loss during app re-signing (#302, [#472]) -- thanks @whispersnowleopard for the report!
• Open only the help document on first launch (#428, [#445]) -- thanks @mundijr for the report! thanks @1waterrj for the contribution!
• Fix Xcode runtime warnings (#401) -- thanks @yusufm for the contribution!

Security

• Harden Quick Look preview sandbox (#385) -- thanks @yusufm for the contribution!
• Harden preview script boundaries (#384) -- thanks @yusufm for the contribution!
• Restrict auto-created link targets (#386) -- thanks @yusufm for the contribution!

Documentation

• Fix and clarify line break example in help.md (#434) -- thanks @mjonss for the contribution!

Infrastructure

• Regression coverage for uppercase task list checkboxes, preview image rendering, and navigation completion; @primer/css and sass tooling bumps in the GitHub-style generator; CI and /review tooling updates; release-train RC process; website update for 3000.0.6; remove gh CLI install machinery from canned workflows.

Known Issues

• On French and other localized builds, the Compilation tab of the Preferences window has a layout regression where the code-block syntax-coloration control overlaps adjacent text. This is cosmetic and does not affect functionality. Tracked in [#397] and targeted for 3000.0.8.

Verification

✅ This build is fully notarized and stapled by Apple.

SHA256 Checksum:

62296564c5b6604b93c9a11849ec441572beadbde2e499dcc232e1d1ddd01c98  MacDown-3000.0.7.dmg

Verify after download:

:::bash
shasum -a 256 MacDown-3000.0.7.dmg

Full Changelog: https://github.com/schuyler/macdown3000/blob/main/CHANGELOG.md