Seatbelt 0.9.9

10 September 2026

• First public beta release of Seatbelt
• Clean, native macOS UI — built entirely in Swift
  • Drag & drop support for files and folders
  • Rock solid, blazing fast transfer engine optimized for large media workflows.
• Built in verification
  • Using industry-standard xxHash
  • Queueing support
  • Support for most industry adopted hash types:
    • SHA-256, SHA-1 and MD5
• Persistent transfers
  • pause/resume between app restarts.
  • Also persists partial checksums across app launches.
• Extensive logging features
  • Search and filtering per log and per file.
  • Grouped image sequences, like files file001.exr -> file0101.exr
  • PDF export with stills
• Support for ASC MHL v2.0
  • Support for chain based directories / files according to spec
  • Integrated ascmhl history viewer in logging window
  • Option to only generate ascmhl for existing generations: useful for updating chain files in existing camera archives, while leaving project files alone
• Sequence transfers
  • Uses your fastest drive as a jump off point for further backups.
  • Create as long a sequence of transfer events as you like.
• Shortcut bar
  • Favorite paths and recent drives for faster workflows
• Initial scripting support

Known Issues:

• Scripting support is work in progress, please report missing features or workflows
• Sequences UI is wip