Following error."Intuit does not support browser" I have updated my MacBook and I am still getting the same error.

Thanks for turning to the Community about your concern, midlandsmaintena.

I appreciate you for performing the initial steps to get past the error. We’ll have to make sure your computer meets the system requirements. This ensures compatibility with your system and helps avoid issues when using QuickBooks Online (QBO).

The recommended operating systems and internet speeds for your Mac is Mac: OS X "Panther" 10.13 or newer. The device will also run with the following minimum systems and internet speeds: Mac: OS X El Capitan 10.11 or newer.

For more details, check this article: System requirements for QuickBooks Online and QuickBooks Online Accountant. It lists all the supported web and mobile browsers as well as their versions.

This reference contains tips on how to improve the performance of your QuickBooks: Why is my QuickBooks Online slow? From there, you’ll see the links to test your internet speed, check your browser, operating system, etc.

Reach out to me again if you need assistance accessing QBO. I’ll get back to make sure this is taken care of for you. Have a good one.

Thanks for posting this here in the Community, @jdoyle9. I'll point you to the right direction for the support.

I understand that things have been challenging for you, and that this is not the type of experience we would like you to have.

You can consider contacting our support team. This way, a representative can review and check to see what's causing this issue on your end. To begin, here's how:

1. Sign in to your QuickBooks Online company.
2. Go to Help(?).
3. Select Contact Us.
4. Enter your concern, then Let's talk.
5. Choose a way to connect with us:

• Start a chat with a support expert.
• Get a callback from the next available expert.
• Ask the community to get help from businesses like yours.
  
  

 To help you in the future, I'll be adding these articles:

• Fix common sign-in errors in QuickBooks Online
• Why is my QuickBooks Online slow?
  
  

You can post here again if you have other QuickBooks-related questions. I'll keep an eye for your response. Keep safe!