Why is iMac not displaying a wallpaper like my other devices but a lock screen in iCloud devices ?

Not all developers provide that information, and you cant look up developers if you are working offline because there is no internet available, and can be a tedious task if you waiting for developer to respond, if you have to communicate with them.

When dragging some apps in the trash, there are other files associated with the app, being installed in other places other than your app folder/directory.

I would stop using it if there is a better replacement for the task, not get moaned at for using it for just removing apps and any traces of them and ignoring it's other tools , knowing they can mess things up.

The Mac OS doesn't have an app to uninstall third party apps clean, as dragging them into the trash may remove the executable app, and not the files that the ap may save to other places in the hard drive and system, which is the purpose I got cleanmymac. I use it to uninstall programs I don't want or don't need anymore. Everything else in the software I don't use. Unless you can give me an idea of a better app to use to uninstall 3rd party apps/ or apps that were not installed via the App Store. Secondly how do you keep it up to date, when updates break software you use, where the apps no longer work after an update... where you would have to buy them again, worse when you cant... Secondly the newer OS is more resource demanding than the OS version that you bought the Mac with it on. Every update takes more hardware resources for system and less for productivity... especially when you cant even update the physical RAM to fairly compensate with the update escapade when it is soldered to the logic board. Not everyone uses their Macs as fancy facebook machines... they actually use them to create art, music and video. Why sometimes I have to update OS on separate external drive and keep existing OS on main SSD/HHD and a work around this.

It appears with the standard wallpaper when logged in my MacBook Pro , but not when logged in my iMac. Does it have anything to do with vintage or "obsolete" hardware ? https://support.apple.com/en-gb/HT201624

I do have maintenance software and no antivirus , which is onyx and cleanmymac where I only use the uninstalling apps feature for apps as when you remove an app it has other places it has files it’s linked to that you can’t find them and only drag the app in the trash 🗑

I have various wallpapers of my 3D art on cycle.