Tool Mass send iMessage for MacOs

I am in need of a tool that can help me to send iMessages to multiple recipients on MacOs. I have chosen iMessage as the messaging platform and I need to personalize each message. The ideal candidate should be able to create a tool that allows me to semi-automate the mass sending process. Multi iCloud account can be add and remove, iMessage can be send from automated icloud account was added. Result must have ( Error, completed, pending ...).

Skills and experience required:
- Experience in MacOs application development
- Proficiency in Swift programming language
- Knowledge of iMessage API
- Ability to create a semi-automated tool for mass sending iMessages