White stuff on the top of my apple cider vinegar? This white stuff has appeared on my Apple cider vinegar. Is it good or do I remove it?

It has been 4 weeks. I was going to strain the apples out today and let it sit for another 4 weeks.

Smell of the vinegar is nice and doesn't have a bad odour.
That is mold. You should skim it off and throw it away. It's probably an indication that your acid to sugar balance is not correct. If it comes back I'd throw away your batch and try again.