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@wallyricks You may be correct that a Windows Update has made this start to occur. Both Windows 10 and 11 have been beefing up security a lot recently, to stop bad/buggy executables and apps from compromising the system. It is possible that the LG SmartShare program has "got away with it" for some time, and as you say, best to choose a better, more up-to-date app.

FYI: the error code 0XC0000374 is a HEAP CORRUPTION in the program you are running, in this case the LG SmartShare program. The error is picked up by the OS Kernel (the NT Kernel internals part that looks after bad memory allocations, de-allocations, and buffer overflows, and invalid pointers). Basically it is a bug in the LG SmartShare program, and when it crashes, it most likely reverts to default settings, that turns the sharing off. You will need to report it direct to LG, this site is ONLY a user to user forum If you want an in-depth read, check this out: https://www.twingate.com/blog/glossary/heap corruption

To ALL users who think they are posting to the manufacturer LG.... YOU ARE NOT! If you look properly at the site Banner/Logo, beneath LG WebOS, is states "Use to User support forum". It is NOT run by, or controlled by LG, and probably rarely monitored by LG either!

This site is NOT run or controlled by LG, it is ONLY a user to user support forum. You need to raise a request with LG company in your region.

This may well be the TV firmware working as designed. You might want to try turning off the SIMPLINK (cec control) in the HDMI settings. However, if you have the Soundbar coming on when the TV turns on, you might lose that facility, and have to turn it on seperately.

Ignore my comment about the Netgear? You obviously ned a VDSL modem! Try disabling IPV6 protocol on both, as you only really need IPV4 in most home networks. Older TV sets might be a problem trying to negotiate IPV6.

Your model needs to be on this list (I don't think that 43" model is, unless it is a UHD UR model): https://www.lg.com/us/support/help-library/how-to-use-airplay-what-lg-tvs-support-airplay-2-CT10000020-20151097893431 Ensure the Mac and the TV are BOTH on the 2.4GHz OR 5GHz WiFi SSIDS.

Do you have any devices connected via HDMI? For example a DVD player, or a set-top-box or PVR? If so, check the cables are not low spec or bad. I had that exact issue, and it was an old/cheap HDMI cable, and even when NOT using that port, it would affect a TV channel display.

Looks like it is CDT, except for a couple of western counties in Texas that use MT (Mountain Time). See: https://www.timeanddate.com/time/zones/cdt

I have an old 4K LG from 2015 that works fine with my Yamaha, EXCEPT for no sound (video stream is fine) from the FETCH Mighty when turning on the TV. Luckily the Yamaha RX-V385 AVR has SCENE buttons on the remote, and I set up the TV button to all the correct inputs, outputs, and sound to recognise the FETCH box properly. I use a tweaked DPL-MOVIE decoder set up for the TV scene button. It is 1 extra step after turning on the TV, waiting for the AVR to initialise, then turn on the FETCH box, then the scene button press, but we are used to that now. This could well be a timing issue with the firmware (TV or FETCH box), as NO software is 100%.

@blaktro That TV supports both 2.4Ghz and 5Ghz Wifi (802.11ac) so try diconnecting the LAN cable, connect to TV to the WiFi.

@Bevb Go to the TV HDMI settings, ensure HDMI-CEC (called SIMPLINK on LG's) is turned on, and ensure it is ALSO on for the Yamaha.

@Susovan Mondal Many owners think that Smart TV's are similar to PC's, or Android Phones, and that you can install any available APP. However, you can ONLY install the apps you see in your LG STORE for YOUR TV model, in YOUR country/region. There are many reasons for it, mostly down to hardware limitations, and OS limitations, AND it requires the APP developers to develop them for the specific model series, and WEBOS level capability. Copyright and DRM also come into play, as not all manufacturers have the same licencing deals.

@Chris TMany owners think that Smart TV's are similar to PC's, or Android Phones, and that you can install any available APP. However, you can ONLY install the apps you see in your LG STORE for YOUR TV model, in YOUR country/region. There are many reasons for it, mostly down to hardware limitations, and OS limitations, AND it requires the APP developers to develop them for the specific model series, and WEBOS level capability. Copyright and DRM also come into play, as not all manufacturers have the same licencing deals.

@Luis Miguel Caston That 1.40 WebOS is a very old version, and newer versions need newer, more powerful hardware, so that is why you don't see updates. It is a bit like expecting Apple TV (or any powerful app) to work on an old PC with Windows 95!