Finally got the TV this evening and have been busy getting it set up and trying some things - and I have a lot more to figure out!
HDMI 1 = cable box for TV.
HDMI 2 = iMac connection.
The HDMI 2 is set to "Game". I also was going over a review site that gave a lot of detail about this TV and one of the things it said, which seemed rather odd, was that if you wanted chroma 4/4/4 (supposedly important for best text), you needed to change the label of whatever connection that benefited from that. And the name had to be "PC"! That seems very strange to have a setting that is based on a name! Well, I did that for HDMI 2. Don't really know if it made any obvious difference since there was a considerable gap in time between when I had it one way and then switched it.
I also had a heck of a time with the display resolution, because it didn't read out the way I expected. With the iMac, you got to choose things like, "1920x1080", etc. So that's the kind of stuff I was looking for with the LG in the Mac preferences. But it is quite different for the LG! Instead you first have to choose "Scaled" in the Mac prefs for this TV and then you get options - but none are listed like the iMac screen options. Instead you get this range of pictures and text underneath which, at one end, says "Larger text" and the other end says "More space". Okay, fine, once I got it right, I could see the "logic". But the different approach, without the expected numbers, led me to think I just wasn't in the right place and I wasted a lot of time looking! You do see numbers if you hover the mouse pointed over one of those pictures. Then, under the larger picture of the display it will say something like, "Looks like 2560x1440". Just not consistent on the UI and I just stumbled across how to see the numbers on the picture.
It defaulted to 4k, but that made the top menu bar too tiny. Other things were too tiny too, but, but not as bad. I could probably the next choice down, but that might still be too much of a strain over time so I went with the 2560x1440, which is the maximum the iMac can actually support anyway.
I don't know if it makes any difference when I drive the TV with a Mac Mini that supports 4k. I'm assuming the sizes will be exactly the same, regardless. If so, when used with the Mac, I'll still have to use the lower resolution. But that's still better than my iMac has now. If there is another way to make menus and text larger, while still running at 4k, let me know!
Oh, before I forget, I saw one odd thing as I started typing this - there is a vertical line that shows up at the start of the line, that looks pretty much like the cursor, except it doesn't flash.
I also noticed that when it continued to the next line of the paragraph, that odd line disappeared. But as soon as I hit ENTER and start typing the next paragraph, it is back at the beginning of the new line. Weird.
Hmmm, sometimes, as I move the cursor, the vertical line doesn't go away. Haven't figured out if there is a consistent pattern to this
For TV use, I still have a lot of stuff to figure out. So far, it seems my cable box controls all the channel stuff. I have no idea what is going on when I tried the LG menu to set up channels. It scanned through "Antenna", something else, and two cable options (don't recall the names) - and found nothing. But seem to have all my channels working, as long as I change them with the cable box.
I also need to figure out how to get things together. I have a Harmony remote which did this with my old TV (turning on the TV and activating the cable box button to send the TV signal. The Mac is pretty much always "on", though often asleep if I'm not using it.) So it is really just a matter of controlling the cable box and TV. And also get the Harmony to switch the source for the TV. Maybe other stuff. Just don't want to need regular access to two remotes!
Also, since this will be doing TV and computer duty, I have to figure out the best way to organize things for when I use it as a TV (or for iTunes where the movie will usually take the whole screen). Because I pretty much never just watch TV. I'm always working on the computer at the same time so I need access to anything that might also be on the LG screen. Will, not everything, but certainly browser stuff. So one thing I might do is open up two Safari windows - it seems that both will show any pinned tabs so, when using the TV as a monitor, I'll take advantage of the big screen by pinning my normal stuff. But if I'm limited to the iMac, the window there will still let me access those same sites.
Still wish there was a way to put TV in a window. Most of the time I don't need the benefit of the big screen for TV, so I'd be fine with a window that took up no more than 1/8th of this screen for 90% of my TV watching.
My eyes limit some things. I don't know what the problem is, but it's pretty much impossible to get any glasses that are really good for me. But it is working pretty well for me at just under 30 inches to the center of the screen. I think I have to work on how bright screen like this one are (all that white!). I'd did some adjustments (like brightness and backlight, I think), but it still seems too bright for this particular usage. At least for this distance from the screen.
Well, much to learn tomorrow.