I am stepping in since Basil is not available today, we do not have information what might be the issue between the mesh to your mac books but there is 2 possibility causing this issue.
Wireless Interference it is a common issue that causing slow and unstable connection to devices connected via Wi-Fi, we did an article on how to eliminate this please check the links below.
Easy Steps to Improve Wi-Fi Connection In Your Home
Wireless Channel on your modem - what is it and why should I change it?
Wireless Network Compatibility - You may need the Mesh's Wireless network mode and check if its compatible with the Mac books.
Let me know how it will go and should your require further assistance.
Another issue rising from this is that my laptop, and my partner's laptop, both will not connect to the downstairs network. We are both using macbook pros. When we try to connect to the network it comes up with a (!) symbol in the toolbar and says there is no internet. And yet, all of the other devices (TV, tablet, moblie and speakers) all connect and get signal fine.
I assume the issue has to do with the way that the laptops connect to wifi compared to how the other devices do. Can you please advise whether this is an issue that needs to be solved within the downstairs modem, or whether it is with our devices.
We have tried resetting the modem and restarting our devices.
Thanks in advance.
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