If Apple is so concerned with recycling, why is they refuse to keep software updated fo the older operating systems.

Software simply cannot make up for the lack of hardware required in newer versions of the OS. Not only is the speed of the CPU much slower, but also the GPU speed and size, would severely limit any operation you would try to do. Newer OS versions take advantage of hardware that could not be anticipated at that time such as the T2 security chip and communication features baked into the Bluetooth chip and Communication modules.

Apple offers a recycling program to keep the devices out of landfills. This keeps chemicals from polluting the earth and allows reuse of the metal and plastics. As you said you can continue to use your old Macs. I have an old MacBook that I take on vacation and use it for web browsing and email without a problem.

olderOSsupport wrote:

I have pretty much reached max with High Sierra OS, because it cannot be further upgraded I am not able to use it with todays applications.

eventually ALL computers will need to be replaced if you have a need for them to work with modern software. this is not just applicable to Macs, but also to windows machines, and even Chromebooks. computers' hardware will always fall behind of new software. sorry, that is just how it is.

and if it is tops out at High Sierra, it has already given you a very long life in computer years.

It wouldn’t likely matter as your device doesn’t have the hardware to support today’s applications. You can continue to use the versions that you have until they too become obsolete.

apple does not force anyone to buy a new Mac. if your Mac is still working for the things you use it for, there is no reason that you have to stop using it. for example, when I retired my previous iMac, (late 2009 model) I gifted it to my dad. it cannot upgrade past High Sierra, but it works for all of his needs.

What do you need as far as an upgrade would help?

Which Applications?