macOS has encrypted the system partition since the T2 chip was introduced. Older hardware doesn’t do encryption by default, but you’ll need a device over seven years old for it not to come with encryption by default.
True, the system partition is, but not where actual user data is. That won’t be encrypted unless the user enables FileVault, granted it does ask during initial setup if you sign in to iCloud if you do want to enable it, but it’s default is off
No desktop OS does, (Excepting the odd Linux distro I’m sure is out there), not even macOS does.
iOS/Android yes
macOS has encrypted the system partition since the T2 chip was introduced. Older hardware doesn’t do encryption by default, but you’ll need a device over seven years old for it not to come with encryption by default.
True, the system partition is, but not where actual user data is. That won’t be encrypted unless the user enables FileVault, granted it does ask during initial setup if you sign in to iCloud if you do want to enable it, but it’s default is off