internet issues with mac OS 10.15.1

Go to System Preferences->Network, select Ethernet and click Advanced...

What do you see under:

a) DNS

b) Proxies

Compare with the respective settings for Wifi.

roccopirr wrote:

Well it appears to be a bug in the upgrade that does not gel with antivirus/security apps.

FWIW, it's not a "bug" in the upgrade. Your "junk" install of an antivirus/security app is no longer compatible. They should never be installed on a Mac in the first place.

I had the same problem when I updated to the 15.1 recent update. Both my MacBook (using wifi) and my iMac (using ethernet) would show very slow internet after a few minutes with pages failing to load. I'd have to disconnect and reconnect from the network and reboot, only to have it happen all over again in a few minutes. Doing this simple thing solved my problem: on both machines: I disabled Intego net barrier ("turn protection off") and enabled the native MacOs firewall instead (system preferences, security and privacy, firewall). Problem solved! No reboot required even. I expect Intego will fix the problem in Net Barrier in their next update. I think the antivirus/anti-malware (virus barrier) provides useful protection, despite the urban legend that MacOs doesn't need it. I wouldn't uninstall the whole thing, that would be throwing out the baby with the bathwater. The antivirus software after years of use, at least by me, has never caused any problems ever, so at least keep that. I don't know if you can uninstall just the firewall, but if you just disable it and wait awhile Intego will likely provide a fix. Hope this works for you.

I had same issue with 10.15 and 10.15.1 where connection randomly went off then the macbook pro fan started to get loud. also my wifi and internet worked with other devices.

Today I Turned off and deleted ESET endpoint security and internet is working fine.

Logically, the only other thing left is your ISP since it worked at the library. Do you know any other people using you ISP with Apple devices having similar problems? This would be unlikely if you are using a big outfit like ATandT, but if it is a small "mom and pop" ISP maybe it is something at their end? Also one other thing you could try is to go into your router's settings and change the DNS server IP addresses from that which your ISP uses to use Google's DNS server (address 8.8.8.8 and 8.8.8.4) or OpenDNS (208.67.222.222 and 208.67.220.220). It's a long shot but worth a try as it is much easier to do than most of the stuff you've tried already. Good luck.

Uninstalling my Intego virus checker has done the trick for me.

Uninstall whatever antivirus you have.

Problem solved. Was an Intego issue. After checking, the Intego update kicked in on the mini automatically before I had the chance to update on my other Macs.

it's a common problem of this version .... one solution is to try reboot in secure mode https://support.apple.com/it-it/HT201262

@Birkhoff92 Thanks for the tip - but tried all the usual solutions - checked network settings, clean install, safe mode boot up (which worked but neither Apple nor I were able to identify the offending 3rd party or Apple bug) - so I simply rolled back until the problem is more definitively identified or until all the 3rd party apps I use have issued fixes - it’s highly likely that the offending App was Intego though - a patch has been released but will wait a little longer before trying again - wasted whole day’s work attempting to fix the issue on the previous pass :(

Don’t disable Intego or Trend Micro yet (if you have it installed). Check for an update first.

I was experiencing slow internet, sometimes it simply stalled, but a recent Intego update fixed all my internet issues. Now, it runs like a dream.

Check all of your third party software for updates before reverting to drastic measures like disabling or uninstalling/reinstalling anything.

You should not be running sophos.

Have you tried using a browser in Safe Mode, or is the issue locking ALL Apps out of the Net?

Loaded the Intego patch, but connection was super slow. Uninstalled Intego for now and everything is back to normal.

The new Intego Release of NetBarrier fixes the issue.

And for all people mentioning that ist is useless to install software like intego or any other alternative: If you use your mac for professional reasons some of your clients simply will require such a software to be installed. Whether ist makes sense or not...