Slow internet despite high internet speed provider
Hi,
I am turning to the community to see if a similar issue has arisen among other users. Sorry for the interminable message.
I have a MacBook Retina 16 inch with macOS Sierra 10.12.6
Since September, my Internet provider offers me a high speed internet (up to 700Mbps).
All of my devices including the one in question worked very well, particularly with video conference (around 300Mbps).
But recently, on the MacBook Retina, video on Google Meet, Zoom and Skype started lagging. Navigating on the Internet is fine, everything seems to work but only when it comes to video it just lagged, connection is weak and then come back to normal, etc.
Everything is still fast on the other devices, no lagging when using video platforms.
I tested the speed online for my MacBook Retina and it gave way below (30-60Mpbs) what it is use to be (200-300Mbps). Depending on where we are (close to the modem Internet speed can reach 500Mbps but it is normally around 200Mbps in the office).
I call the Internet provider and after troubleshooting and assessment of very good internet, the problem remains for this device apparently.
I removed the caches, cookies and navigation data, empty the trash, etc. Still nothing changed.
I tested the ping which gave me 100% transfer with 0.0% packet loss which indicate that it's might not be a wifi problem but Internet... or device problem.
I removed the existing Wi-Fi preferences in macOS Sierra in the system configuration
(e.g. com.apple.airport.preferences.plist.
com.apple.network.eapolclient.configuration.plist
com.apple.wifi.message-tracer.plist
NetworkInterfaces.plist
preferences.plist) reboot the computer and nothing. Well, it gave me around around 100-200 Mbps so I thought it was it, but later in the day it came back to 30-50Mpbs.
Then, I changed the DNS to Google 8.8.8.8 and 8.8.4.4 Same thing, it gave me around around 100-200 Mbps for a while and came back to slow speed. I tried DNS Cloudflare 1.1.1.1 and 1.0.0.1 and still nothing changed.
I can't plug to the ethernet since the MacBook has no port.
I boot into safe boot and nothing.
I know wifi range can be an issue and my next step is to test a wifi booster.
Is it interference with other frequencies ? Is it the LPSS adapters I am out of idea what would cause this slow internet speed or at least unsteady speed.
Thank for your time !
MacBook