Well, I'm on Tahoe now (as I got an m5 MBA over the weekend) and after a few days my thoughts are this:
1. Buggy. Lots of little niggles and bugs and weirdness that you only notice after using it for a while and with lots of familiarity with your setup and files on previous OS versions.
2. Not particularly glassy. This is either good or bad, depending upon your feelings about LG. I'm mostly able to not think about this aspect as it's much less implemented vs iOS/iPadOS 26 versions.
3. I really would love less padding everywhere, or some way to dial that down in the future (compact view or something)
4. Same as #3 but for the overly rounded corners. I do not understand that change. The combo of more padding and overly rounded corners just takes away from usable area for your actual content. This becomes a real issue on smaller screens (like on my 13" MBA). Luckily I primarily use it docked to a huge OLED, but on the go, this sucks.
5. Related to #3 & #4, It'd be nice to see some more theming/optionality implemented in 27 for more contrast in the UI that isn't just full blown "Crayola lines around everything" (which is ugly and what you get with the Accessibility toggle for "more contrast". Some additional defaults to choose from that aren't just "white, some more white and some less white and blending with background", etc would be very welcome. I don't know why everything is just 50 shades of white now.
5. There are lots of new niceties like:
All in all, I find the 26 OSes easiest to live with on the Mac, which is good for me as that's the platform I care the most about.
1. Buggy. Lots of little niggles and bugs and weirdness that you only notice after using it for a while and with lots of familiarity with your setup and files on previous OS versions.
2. Not particularly glassy. This is either good or bad, depending upon your feelings about LG. I'm mostly able to not think about this aspect as it's much less implemented vs iOS/iPadOS 26 versions.
3. I really would love less padding everywhere, or some way to dial that down in the future (compact view or something)
4. Same as #3 but for the overly rounded corners. I do not understand that change. The combo of more padding and overly rounded corners just takes away from usable area for your actual content. This becomes a real issue on smaller screens (like on my 13" MBA). Luckily I primarily use it docked to a huge OLED, but on the go, this sucks.
5. Related to #3 & #4, It'd be nice to see some more theming/optionality implemented in 27 for more contrast in the UI that isn't just full blown "Crayola lines around everything" (which is ugly and what you get with the Accessibility toggle for "more contrast". Some additional defaults to choose from that aren't just "white, some more white and some less white and blending with background", etc would be very welcome. I don't know why everything is just 50 shades of white now.
5. There are lots of new niceties like:
- one time message codes being autofilled (and auto deleted) when using browsers other than Safari (I use FF)
- battery charge limiting built into the OS and well done
- (will add to this as I come across things)
- Spotlight is very good. Very useful and very fast (granted, I'm on an M5)
- System Settings is getting better and snappier as time goes on also.
All in all, I find the 26 OSes easiest to live with on the Mac, which is good for me as that's the platform I care the most about.