My iPod will not sync and iTunes won't upgrade
Yesterday I thought this problem was successfully resolved. I have a 2nd generation iPod and a Macbook 5,2 purchased July of 2009. After many difficulties, I upgraded to 10.6.3, but then iTunes wouldn't sync with my device or even recognize it was plugged in. I finally did a clean install of 10.6.3, and then my iPod would sync. I was very happy, but I still couldn't use dropbox, something I need to do. So I then upgraded to 10.6.8, and, while the computer upgraded fine as near as I can tell - it says it is running 10.6.8 - it again refused to play nice with the iPod. So, following previous directions, I tried to upgrade to iTunes 12.2.2. I did this by clicking on the iTunes name and going down the pull-down menu to "check for updates". Then I told it that yes, I wanted to update to 12.2.2. I clicked everything it told me to click, I agreed with everything it told me to do, and I restarted the computer when it said to do so. However, the computer would not shut down fully and needed me to force it to power down. I did this after 30 minutes of looking at a starry screen which was not shutting down. Before I started trying to upgrade, the computer would restart without problems. After the clean install it would restart without problems.
Now my iPod will not sync with iTunes, and even though I did everything I know how to do to upgrade, I am not running iTunes 12.2.2 but am still on 10.6.3. When I connect my iPod, iPhoto starts up and recognizes my device, but iTunes does nothing. What do I do now?
Thank you very much for considering my question.
iPod touch (2nd generation)