Technology

I don't have a Mac but I can offer you a viewpoint: in general it is better to compartmentalise your data and if you're using products by the big tech companies (Apple, Google, Microsoft, Meta etc) then to separate date between them as much as possible. In other words, don't put all your eggs in one basket.

If you're on a Mac, you're in Apple's ecosystem. In some ways they provide better privacy as they're not as dependent on advertising like Google for example, however they do have advertising buisness and are still mining your data and profiling you as it's their business to sell you stuff whether that's more Apple hardware or digital content.

So I personally wouldn't be using all their various apps without knowing in detail what data is going to them. Web browsers, email and calendars are data gold mines, as are anywhere you shop for content such as App stores, music, video etc.

If I were on Apple, I would be using Firefox so as to wall off as much as my data from Apple as possible. I'd also consider Thunderbird for email & calendar to remove Apple from that data trove. I personally also pay for my email service rather than using anything bundled in (i.e. iCloud) - the reason being you're not beholden to one provider longterm and can access and migrate your data on other devices (e.g. not Apple in the case of iCloud).

Apple tries to sell itself as a bastion of privacy. It's not - it's probably a bit better than some of it's competitors but it still is involved in user tracking and selling data to advertisers. They made a fanfare about letting users disable advertiser tracking on iPhones but what they didn't make as much noise about is that they actually built the tracking tools in the first place, and they've been building their advertising business as the services side of Apple is big money (it's app store, it's content etc)