hi all,
i finally managed to sync my iphone 11pro on ios 13.4 to my early 2011 mbp 13 inch on high sierra.
Here is how it worked.
1- uninstall itunes from your mac book( of course make a backup of your library befor doing so)
then empty the trash. And restart and re install itunes. Itunes file available on apple website.
2- there is a security update on app store 2020-002 which i had to directly download it from apple website in order to install it and keep a copy Of the file for now. Install it and restart.
3- connect your iphone without opening itunes, it will ask you for a software update for itunes in order to be compatible with your phone. Go ahead and install this update as well.
and now you should see your phone showing on iTunes.
anyone not sure about the steps ask, and i will provide links to further explain what I've done and what is the procedure exactly.
cheers