1 It's time for Apple to give up the single menu bar. It made sense when the GUI (and computers in general) was a new concept to the masses and screens were small. It doesn't make sense on 21+" retina displays in 2016 when even my grandparents in their late 80s use smart phones. Worse, Apple doubled down on the menu bar in El Capitan by forcing it on to every display and hiding the control to remove it from secondary displays under "Mission Control" with a check box titled "Displays have separate spaces". WTF Apple?

2 Yep.  On a notebook, and maybe even on the 21" model, a single menu bar isn't that much of an issue.  On a 27" screen, it's a constant nuisance.

One thing I like is that Microsoft Office for Mac blatantly ignores the Apple UI guidelines and gives each window its own menu bar, the way Doug intended.

3 Apple had a good point originally about the placement of the menu bar. The top of the screen is prime UI real estate, because you whip the mouse at it, and it will stop at the menu bar (On Windows, you end up in the title bar, or nowhere useful.). With the Mouse Acceleration, a quick, hard gesture could send it there.

Having the menu bar attached to the inside of a window that can be any size takes a lot more care and precision on the part of the user to hit the target.

On the other hand, Windows really screwed up with some of their text box handling routines. Forex, on the Mac, clicking in the blank space below the paragraph will take your cursor to the end of the text. On windows, it will take you some point in the middle of the last line above the mouse's X position.  And hitting the arrow keys while there's a text selection did much more sensible things (And don't get me started on Windows and auto-extending text selections in ways you don't want to when you're holding shift.... Maddening!)

4 On a small screen, and particularly on a small low-resolution screen like the original 512x342 Mac, a single unified menu is the only sane choice.  (The Amiga did the same thing.)

On a 27" 5120x2880 screen, though, it's ridiculous, and the mouse acceleration settings that you need to make it at all accessible screw up every other mouse function.

5 To put it another way, as monitor sizes have grown, the top of the screen has remained beachfront property...  But now it's beachfront in Alaska.  Which...  Oh, hey, $35,000 for 20 acres...

6 Yeah, they may as well right click and give you a pop-up of the application menu....

7 Why not send email to the customer service? May be they can help you solve the problem?

8 Your new spammer hit me, too.