I have a newish MacBook Pro 16" M1 Max. Im a seasoned Mac tech. Used to work for Apple, the whole 9 yards.
I have had this issue pop up in the last week or so where I will be watching video content either in Quicktime, Finder preview, or VLC from my giant NAS where I host all my content, and what happens is about 10 minutes in, after previewing and opening several files, it just slows to a crawl. I look at my network traffic monitor and instead of being between 6-12Mb/s down to my Mac its like 300k. And it feels it. It is SLOWW and the video stutters and stalls. If I unplug the ethernet dongle and then plug it back in, its fine again for 10 minutes then it Fritzes out the exact same way. Its totally reproducible which is great bc I will know when Ive solved it. Also strange is that the rest of the network connection works just fine while this is happening. I can run a speedtest and connect to other servers that run at full speed which tells me its something above the link layer. And its pulling data off a share so is it an IO thing, a networking thing? But then the rest of the internet connection works as does accessing video stored locally so its something to do with mounted volumes?
Ive isolated:
- Four different NICs with four different chipsets - 2 Realtek chipsets (1G and a 2.5G, same issue), an Intel chipset on a thunderbolt 3 dock, and a thunderbolt 3 10G SFP+ adapter. All have the same exact issue, same exact pattern to reproduce. Just play a few files.
- Ive plugged my Mac directly into the NAS I used (Synology) bypassing my whole network. Same issue.
- SMB and AFP - same issue
- Booted in safe mode - same issue
- I tried a new test user - issue completely resolves itself.
So the root of the problem must be in User/Library somewhere. Im thinking start w Finder and networking plists and go from there but also wondering if anybody has a hunch they'd like to share. If I can't figure it out I will probably just back up my user and blow the machine away and reinstall. Not a huge inconvenience. A pain for sure but Id rather do that than keep getting my work derailed and shooting in the dark as it were.
Thanks
I have had this issue pop up in the last week or so where I will be watching video content either in Quicktime, Finder preview, or VLC from my giant NAS where I host all my content, and what happens is about 10 minutes in, after previewing and opening several files, it just slows to a crawl. I look at my network traffic monitor and instead of being between 6-12Mb/s down to my Mac its like 300k. And it feels it. It is SLOWW and the video stutters and stalls. If I unplug the ethernet dongle and then plug it back in, its fine again for 10 minutes then it Fritzes out the exact same way. Its totally reproducible which is great bc I will know when Ive solved it. Also strange is that the rest of the network connection works just fine while this is happening. I can run a speedtest and connect to other servers that run at full speed which tells me its something above the link layer. And its pulling data off a share so is it an IO thing, a networking thing? But then the rest of the internet connection works as does accessing video stored locally so its something to do with mounted volumes?
Ive isolated:
- Four different NICs with four different chipsets - 2 Realtek chipsets (1G and a 2.5G, same issue), an Intel chipset on a thunderbolt 3 dock, and a thunderbolt 3 10G SFP+ adapter. All have the same exact issue, same exact pattern to reproduce. Just play a few files.
- Ive plugged my Mac directly into the NAS I used (Synology) bypassing my whole network. Same issue.
- SMB and AFP - same issue
- Booted in safe mode - same issue
- I tried a new test user - issue completely resolves itself.
So the root of the problem must be in User/Library somewhere. Im thinking start w Finder and networking plists and go from there but also wondering if anybody has a hunch they'd like to share. If I can't figure it out I will probably just back up my user and blow the machine away and reinstall. Not a huge inconvenience. A pain for sure but Id rather do that than keep getting my work derailed and shooting in the dark as it were.
Thanks
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