I doubt it. Even with universal ad blocking on their platforms, iPhones are the minority worldwide and Macs even more so.
Websites would just make sites painful to use for Apple users and force them into exceptionally expensive subscriptions (which most people won’t pay for) or onto cheap devices that allow endless ads.
Average iPhone users may be more valuable to the average advertiser when compared to the average Andoid user, but there are plenty of markets where I'd say there are plenty of advertisers who'd benefit from targetting the lower end of the income spectrum.
