macOS is nowhere near as bad as Windows. You can still use it without an Apple account, and there are no ads/spyware (unless you really want to pick straws) even if you do use an Apple account.
It's better than Windows, but it's still spyware.
PRISM is an internal codename for (not bulk! specific!) downloading of data direct from FAANG et al servers under FISA Amendments Act section 702. It's warrantless but is not bulk/mass surveillance. (Also, it technically is a "court order" as there is a secret rubber stamp "FISA court", but it doesn't require a warrant or probable cause, or allow for review/appeal because it's proceedings are classified.)
https://en.m.wikipedia.org/wiki/United_States_Foreign_Intell...
Theoretically it's not supposed to be used against US citizens but Snowden has claimed that a secret interpretation in a secret court has decided that it can be.
https://www.eff.org/702-spying
They use it a ton, though, as it's the #1 most used source in the US IC. Apple turns over more than 30k user accounts of data under warrantless FISA orders each year, per their own transparency report.
That said, Apple has (in response to my blog post you linked) committed to a) encrypting that OCSP traffic in the next macOS, and b) deleting all of their stored logs.
That wouldn't have stopped the IC from monitoring all of that previous unencrypted traffic and logging it themselves, though, but that has nothing to do with PRISM/FISA. That's bulk collection, which is a different thing than PRISM.
