Spellcheck & grammar check in macOS doesn't work correctly

Description

Spellcheck and grammar check on macOS not working properly

To Reproduce…

Steps to reproduce the behavior:

  1. Create or reply to a message

  2. Type text with spelling or grammar error

Expected Behavior

Spellcheck and grammar check engages, highlights or auto-corrects errors.

Screenshots

Setup

  • OS and Version: macOS 14.7.2 on an M2 Mac Mini
    • Installation Method: Installer
  • Mailspring Version: 1.23.0 (1.23.0)

Additional Context

The grammar check even says “no issues.” (See screenshot.)
Spell and grammar check are working at the OS-level on other apps (TextEdit, Notes, etc)
This has led to some rather embarrassing emails being sent. (“God morning”, “Ho Nancy”, etc.