Issues with redirecting domain name to another Apache with WordPress

I am currently running into an issue where if someone types in ‘myolddomain.com’, which is redirected to mynewdomain.com, into Google it will bring up the error message about ‘Attackers trying to steal information’. I do understand the concept that you cannot go from HTTPS to HTTPS without having the SSL certificate match the domain that gets redirected, but I was wondering if there was a way to force browsers to view the old domain as HTTP only and not attempt to load it as HTTPS. I know there is a way I just don’t know how to do it in Apache because I have an IIS site that does this and has no issues. I tried several different rewrite rules and disabling WordPress SSL plugins (this was an inherited site) and still have nothing. If more information is needed please let me know. I appreciate your time.