I cannot sync my iPhone and iPad to my iMac because Itunes does not recognize them
Who can help me to fix it? I am unable to update my HighSierra. Whenever I try to update to Catalina I receive a mesage saying that my iMac does not support it. And my iTunes a few weeks ago started to not recognize my external devices. I tried many ways but the problem is still there.
iMac 27″, macOS 10.13