Hi,
Thanks for the reply.
Sorry I meant Photos not iPhoto.
iCloud photos is enabled on my iphone and mac and Photo stream is not enabled.
I have managed to remove all duplicate photos on my iphone using an app and then manually deleted duplicate videos. I think the problem of duplicates may have occurred as every time I plugged my iphone into my mac and opened Photos, I was then clicking the import new photos tab, when I'm guessing I should have just allowed Photos to update from iCloud?
I'm hoping now after deleting the duplicates on my phone, when I open Photos on my Mac, Photos should restore itself to match what's now on my phone using iCloud?
I should only need to plug my phone into my mac to do a phone backup through finder in Catalina and leave iCloud to deal with syncing photos between devices?