In Windows 10, go to Settings app > System > Display and then zoom to 125%. While this makes everything on your screen bigger (and you might have to restart your PC), it is perhaps the only solution as zooming Unity’s UI is impossible at the moment.
Ouch! Too bad. In Windows, that zoom setting makes everything larger, but you have a mac
I always thought Macs were old people’s computers, but how do they expect people with not-ideal eyes to use them? Oh Apple… that’s why.
Don’t be absurd. This has nothing to do with Apple; it’s Unity that doesn’t support larger fonts. Macs do of course support screen zooming. Also, the Mac version of the Unity editor supports retina displays, whereas the Windows version does not. Please leave platform wars out of this forum, thank you. (Also, please edit your signature to be less antagonistic.)