I have MacOS Mojave 10.14.1 and have no plans to upgrade to Catalina. I have an urgent problem in that I'm running out of storage space on my MacBook Pro (Retina, 15-inch, Mid 2014). I need to offload a lot of files urgently. I'm moving most of my Documents to an external Seagate 4T HDD but the main problem is my photos. I'd like to delete all my photos from my iPhone but I think that would delete them on the Mac as well. I hate the Photos app and have been using iPhoto and Image Capture. I pay for iCloud storage but I want to stop using iCloud as soon as possible as I find it very confusing and hard to understand how to use it. So my question is...how can I delete all my photos from my iPhone and not delete them on my Mac? I want to spend some time removing them from Photos and copying them from the Mac to an external drive and continuing to use iPhoto and Image capture rather than Photos.