No its definitely not necessary. Nice to have maybe. In enterprise settings I've seen 100s of developers working across many organisations in the uk. At least 9

No its definitely not necessary. Nice to have maybe. In enterprise settings I've seen 100s of developers working across many organisations in the uk. At least 99% of them have used windows laptops. They might have had a vm with Linux or be ssh-ing to a server. Sure in a lot of startups or at conferences you might see a lot of macs. The hardware is (or was) very nicely made but for coding the software isn't that much different to a good Linux distro. Remember many of your target users will be using Windows pcs or android phones and "it's working on my mac" is unlikely to keep them happy.