I have tried several times to download lightroom using my creative cloud account and each time, the computer attempts to open the creative cloud client and/or the application manager program which proceeded to attempt to open, to no avail.
I have the same problem in Windows.
Application manager starts the download then says download corrupt try again later.
Trying latter doesn't help.
I also cant download the trial version of Lightroom direct from Adobe to try and install it without application manager. The trial download link doesn't work.
Europe, Middle East and Africa