Calendar Sync
Calendar Sync is a free, open-source, single-user command-line tool for
macOS that copies events from a calendar in your local macOS Calendar app to
a Google Calendar you choose. It’s a personal utility for seeing a
corporate/work calendar alongside your personal Google Calendar.
- One-way sync from macOS Calendar → Google Calendar
- Smart deduplication (no duplicates on re-runs)
- Updates and deletions on the source calendar are reflected on Google
- Personal Google Calendar events are never touched
- Secure token storage in macOS Keychain, gated by Touch ID
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