Creative Cloud Desktop won't install on brand new iMac OS X El Capitan

If you haven't tried below steps , try once :

Step 1)

Click on the Finder and look for the options listed next to Apple Icon located at the top left corner of the Desktop screen and click on "Go" menu button and select "Utilities" option.

(Applications>Utiliites)

Locate Adobe Creative Cloud and Adobe Application Manager folder under Utilities window and trash both folders.

Step 2)

Trash Adobe Creative Cloud folder from Applications as well.

Step 3)

1) Right click on Finder icon and  select "Go-ToFolder " option.

2) You will get a text box, type-in below command and then hit 'Return' key.( Do not miss ~ symbol)

~/library

3)Then navigate to Application Support>Adobe.

Open Adobe folder and trash folders named AAMUpdater and OOBE.

Step 4)

1) Right click on Finder icon and  select "Go-To" Folder option.

2) You will get a text box, type-in below command and then hit 'Return' key.

/library

3)Then navigate to Application Support>Adobe.

Open Adobe folder and trash folders named AAMUpdater ,Adobe Application Manager and OOBE.

Step 5)

Click on the below link and download & run Adobe Cleaner tool :

Select the option "Adobe Application Manager for Mac OS X 10.6" and then click on "Clean up Selected" .

http://download.macromedia.com/SupportTools/Cleaner/mac/AdobeCreativeCloudCleanerTool.dmg

Step 6 )

Click on the below link and download Adobe Application Manager and install the same :

http://download.adobe.com/pub/adobe/creativesuite/cc/mac/ApplicationManager9.0_all.dmg

Once the installation process is completed, installation box will disappear, then open Application folder and locate Adobe Application manager launch icon , double click on it and update .

Once the update is completed. It shud launch Adobe Creative Cloud app.