Mac OS networking issues. No internet connection over Wifi when connected to a second network over ethernet.

Hi all

Sorry if this is the wrong place to post this question but I was wondering if anyone could help.

I have a number of macbook pros connected to a freenas server via a managed switch all on static IPs. They can all connect to the server with no issue and there is no connection to the internet over this interface.

As these macs need an internet connection as well so they are also connected to a wifi network which has internet access.

The issue I am having is that though the macs connect to wifi they will not connect to the internet when the ethernet connection is present. The moment I disconnect a macbook from the ethernet network the internet starts working. There are also some windows based machines being used in the same way which do not have this issue.

Has anyone here experienced this and know of a fix?

Thanks in advance! T