I have bitdefender and I was wondering how I can check if it does it on my pc and mac and how I can disable it (if possible). Could you help me in the right direction?
Open https://www.google.com/ and see what cert you've got.
If it's "bitdefender something" instead of google
then uncheck "Scan SSL" in bitdefender and google how to remove root cert from trusted root cert store assuming former doesn't do it for you.