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IMAC won’t connect over Ethernet only WiFi. Tried numerous cables

No Ethernet connection. WiFi works

iMac 21.5″, macOS 10.15

Posted on Jun 20, 2021 6:55 AM

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Question marked as Top-ranking reply

Posted on Jun 20, 2021 7:34 AM

  • Please reset Modem (yes, even if every other device works okay.
  • Please reset Router (yes, even if every other device works okay.
  • Restart iMac in Safe Mode, then restart normally and test. Use Safe Mode to isolate issues with your Mac



By chance is there any third party antivirus, cleaning, or ANY other third party "maintenance apps" installed?

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Question marked as Top-ranking reply

Jun 20, 2021 7:34 AM in response to njjeff201

  • Please reset Modem (yes, even if every other device works okay.
  • Please reset Router (yes, even if every other device works okay.
  • Restart iMac in Safe Mode, then restart normally and test. Use Safe Mode to isolate issues with your Mac



By chance is there any third party antivirus, cleaning, or ANY other third party "maintenance apps" installed?

Jul 2, 2021 2:41 PM in response to montyshelton2021

Don't know if it is directly related to your problem but there is no reason to ever install or run any 3rd party "cleaning", "optimizing", "speed-up", anti-virus, VPN or security apps on your Mac.  This user tip describes what you need to know and do in order to protect your Mac: Effective defenses against malware and other threats - Apple Community.  


There are no known viruses, i.e. self propagating, for Macs.  There are, however, adware and malware which require the user to install although unwittingly most of the time thru sneaky links, etc.   


Anti Virus developers try to group all types as viruses into their ad campaigns of fear.  They do a poor job of the detecting and isolating the adware and malware.  Since there are no viruses these apps use up a lot of system resources searching for what is non-existent and adversely affect system and app performance.


There is one app, Malwarebytes, which was developed by a long time contributor to these forums and a highly respected member of the computer security community, that is desshoigned solely to seek out adware and known malware and remove it.  The free version is more than adequate for most users.  


Also, unless you're using a true VPN tunnel, such as between you and your employer's or bank's servers, they are useless from a privacy standpoint: Public VPN's are anything but private.  


I would uninstall Norton according to the developer's instructions.


Jul 2, 2021 2:47 PM in response to montyshelton2021

The best antivirus, cleaning app, and overall maintenance app for Mac OS is Mac OS itself. All you need to do with Mac OS to keep it secure and running well is to keep it up-to-date and do periodic (about 1x per week) restarts. Other than that, leave it alone. Adding third party antivirus, cleaning, security and other types of maintenance apps to Mac OS adds no additional level of security. The only thing these apps do is have the opposite affect users want. They make Mac OS slow, unstable, generate odd behavior (much like you are experiencing) and make Mac OS appear buggy.

 

Please locate the developers uninstall instructions for Norton and follow to the letter. Then restart in Safe Mode per the directions in Use safe mode to isolate issues with your Mac and then restart normally.



IMAC won’t connect over Ethernet only WiFi. Tried numerous cables

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