Nope, no Resetta or anything like it. The laptop is at least 5 or 6 years old.
You may be able to update it through the Mac's software update.
https://support.apple.com/en-us/HT201541When I had OS 10.6.8, Apple kept trying to push OS 10.7 on me through the software update. I don't know if they're still doing that, but running the software update might be one way to see if you can go to a newer Mac version.
You had to do this whole dragging to the Applications and then using this goofy "eject" thing. I'm used to downloading, installing and being done!
Downloading, installing, and being done is pretty much the same as you're doing on a Mac. It just looks a little different. You download and mount the dmg, then drag what it tells you to the Applications folder to install.
The "eject" thing unmounts the dmg -- not that different from closing 7zip when you're done using it.