Thanks for the quick response.

Firmware Version is V3.2.16.6_1.4.4. I don't know if this was what was installed in the 10 weeks or so that the macbook worked just fine, or if it was updated when I checked for updated firmware as one of my first thoughts about trouble shooting last week.

To be clear, the only device that is having a problem is the macbook pro. And that device worked just fine for 10 weeks or so from install until about Thanksgiving. The macbook is circa 2015 but we've updated software so it is current.

Have done the power off of main and satellites multiple times, with at least 1 min but usually more like 5 min break. I plug in the satellites first and then the router--is that order correct?

The macbook has demonstrated the same speed issue when wirelessless on the main router or satellites. I don't think I have any cables to do a wired connection.

Modem is ARRIS BGW 210-700 from ATT. I have not done the bridge or pass through modification. Not a techie as I said, so when I unboxed the orbi and connected it, all worked just fine on all devices for weeks until last week. And frankly, since all the other devices, including a work from home computer, are working ok, I am reluctant to make a lot of changes when IT WAS WORKING last week. I'm worried I will mess up the rest of the accesses!

Other ideas?

Thanks

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Rax30 Nighthawk