Q: how can i stop seeing message(text) notifications on my mac

Hello there, capodannoswims.

It sounds like you want to stop receiving SMS messages via Messages on your Mac. The following Knowledge Base article offers where the settings are, you will just want to undo the steps it recommends:

Use Continuity to connect your iPhone, iPad, iPod touch, and Mac - Apple Support

SMS

With Continuity, all the SMS and MMS text messages you send and receive on your iPhone also appear on your Mac, iPad, and iPod touch. Even if the person you’re communicating with doesn’t have an iPhone. And regardless of what phone they have, you can reply from whichever device is closest to you, including your iPad or Mac. You can also initiate a  conversation by clicking a phone number in Safari, Contacts, or Calendar.

To use Continuity for SMS and MMS with your iPhone and your Mac, iPad or iPod touch

Your iPhone, iPad, and iPod touch need to use iOS 8.1, and your Mac needs to use OS X Yosemite.

1. Sign in to iMessage on your iPhone, your other iOS devices, and your Mac using the same Apple ID.
2. On your iPhone: Go to Settings > Messages > Send & Receive > You Can Be Reached By, and add a check to both your phone number and email address. Then, go to Settings > Messages > Text Message Forwarding, and enable the device(s) you would like to forward messages to.
3. Your Mac, iPad, or iPod touch will display a code. Enter this code on your iPhone to verify the SMS feature.

 

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Cheers.