I am an admin user, and the installation was failing from the disk images step, not opening from the download folders. I don't run any anti virus software.I ended up creating another admin account to install the files, and that worked. Photo Pro and ...
I'm experiening the same issue on MacOS 10.14 Mojave. Download goes fine, archive opens a disk image. I clik on the installer.app and get a warning about running files from that image. I conintue, a progress bar show Extracting Files... and then noth...
