Blocking text messages with Textkiller

Welcome Whoop95,

Thank you for using Apple Support Communities. Based on your post, your iMac isn't blocking spam/phishing messages. We'll do our best to assist with this.

Apple now has some built-in options for the iOS, iPadOS, and macOS devices for blocking unknown contacts. See: Block phone numbers, contacts, and emails on your iPhone, iPad, or iPod touch Check out section, 'Filter messages from unknown senders'.

When you block contacts or unknown contacts on your iPhone, it will also add those as contacts to your blocked list on your other devices.

Specifically block messages in the Messages app: Block messages in Messages on Mac

Or you could block anyone except your contact list: Set up communication limits in Screen Time on Mac

We'd recommend using these methods, so they sync across your devices.

Hoping this helps out, take care!

Hi Whoop95,

Yes, it sounds related to phishing. If that's the case and this is only happening through text messages and not iMessages, then you'd want to contact your wireless carrier for next steps: Recognize and avoid phishing messages, phony support calls, and other scams

Wishing you the best, cheers.

Hey Whoop95,

In that case, when you use an iOS app to accomplish something, it would have to be supported on the Mac, as well. From what you've mentioned the app works on your iPhone and iPad, but not your Mac; so the app is likely not supported for macOS.

We'd recommend removing the Textkiller app to test and use the built-in block Messages suggestions above to properly sync those blocked contacts and messages to your Mac, as well.

Have a lovely week!