Apple still supports 1 to 2 OS X releases back from whatever the latest one is.
Only if you have an older Mac that originally shipped with that older OS release.
[doublepost=1519552709][/doublepost]1. Since the very early versions of Mac OS X, there is no way to rearrange the list of Favorite Servers in the Finder's Connect To Server window. If a person has added multiple servers to the Favorite Servers list, one would expect to be able to rearrange servers simply by dragging. But after more than 10 years, it is still not possible to rearrange servers. It seems that Apple engineers did not bother to test the user interface with more than a single server in the list.
2. Starting with Yosemite, many applications open in the bottom left area of the screen and there is no way to change that behavior. Try using a 30 inch, 2560x1600 monitor and you will see exactly what I mean. Examples include TextEdit and disk images. When changing primary display between a 15 inch laptop and 30 inch monitor, Finder windows, Safari and other applications are all thrown into the bottom left corner of the 30 inch monitor. It seems that both Apple and third party developers only test their window placements on 12 inch MacBook screens and assume that everybody in the world uses a 12 inch MacBook as their only display. When I work on the smaller screen, I am actually afraid to move any windows around for fear that they will be thrown into the bottom left corner of my 30 inch monitor once I plug it in. I don't recall seeing these irritating window positioning issues before Yosemite.
3. Starting with Sierra, the Console application has been crippled and has lost most of its previous functionality. It introduces many UI bugs that are still not fixed. Biggest functionality issue is that it only shows messages that are generated after Console is opened - not very useful for viewing system logs. Does Apple expect people to always know beforehand when they will need to see the messages so they can open Console before those messages are generated? Meanwhile, Macworld publishes a puff piece "review" that does not address any of the issues at all:
https://www.macworld.com/article/31...sier-to-get-the-mac-information-you-need.html
4. With every release of Mac OS, Apple keeps hiding more and more functionality behind hidden Option key shortcuts. Examples:
Instead of simply using Escape key to "unselect all" in the Finder, it has been changed to Command-Option-A. And you don't see it in the Edit menu unless you hold down Option key while Edit menu is open.
When copying a group of files and the destination already contains a file with the name name, the file copy dialog does not contain a Skip button. But if you hold the Option key, one of the buttons changes to Skip.
In System Preferences > Displays, there is no longer a Detect Displays button. But if you hold down the Option key, the Detect Displays button magically appears.
There is stuff like this littered all over the menu bar commands in the Finder. How are people supposed to know all of these hidden Option key shortcuts? Does Apple expect people to hold down the Option key while opening every menu and in every dialog box? Does Apple expect people to scour the internet in search of hidden Option key shortcuts? In locations where additional commands are available by holding down the Option key, Apple couldn't even bother to provide a simple visual indicator to tell people "Hold down Option key to see additional commands" so people won't have to guess?
. I would honestly wait or skip HS (luckily I did on my iMac), since Apples standard response line is that it's a problem with your hardware; because magically every person who is having a graphical issue the moment they install 10.13 coincidentally had their hardware at the exact same time makes perfect sense, right, Right?