2012 the Mac Mini has sluggish 5 GHz Wi - Fi

OK, this is weird.

Suddenly, my Mac mini is to have WiFi connections intermittently slow on the 5 GHz band, a router Linksys WRT-1900AC.

I have a 105 MB Comcast connection, and usually tests Speedtest.net Mini cede passage on 100 Mbps results, usually in the 120 Mbps.

This morning, I started having intermittent slowness. Sometimes I would grind to a halt, or there would be a long time to connect to a website. Speedtest pings during these episodes would be too high that 990 - in general, they are about 14 ms.

The 2.4 GHz connection, which generally gives me a slower rate in the range of 50 Mbps, is fine. The only issues I see are at 5 GHz, where I have the chance to get a speed in the range of 30 to 50 Mbps.

All other devices - iPads, iPhones, MacBook Pro, 4th-gen Apple TV, Microsoft Surface Pro 4 - connect at 5 GHz very well. I get my gears zippy on other devices. Just not the Mini.

I rebooted the router and the modem. I emptied the cache DNS on the Mini. I deleted the Linksys SSD in Network preferences then reconnected. I removed the Mac Mini map of the network of the Linksys firmware and restored. So far, nothing works.

One thing to note: a few weeks ago, I installed a couple of SSD in the Mini, replacing a single stock of HARD drive. Which is to remove the antenna plate (and everything else inside the Mini). But I re-assembled very well, and it has been working fine since then. I think that if there is a problem with the antenna, it would affect the 2.4 GHz band, too.

Also, we moved into a new apartment in the same complex, taking our Comcast service with us. It worked fine when I put in place Sunday and worked a lot since then. But the Mini is in a new location on the block.

Any suggestions for what to do next?

If possible, please connect to the router with Ethernet and see if there is an improvement.

Tags: Mac

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