Installer Failed To Initialize Photoshop CC Mac

Question

Hi, I am on a Macbook Air 8gb Memory, 216 GB storage, i7 with around 60 gb free on my SSD, and I'm trying to install Photoshop CC. I currently have Illustrator and After Effects CS6. Basically, what happens, is that whenever I open the Photoshop Installer, I get this:
I have tried all sorts of things so far, including running things like the Adobe Cleaner, but nothing seems to work. Any help would be greatly appreciated,
Thanks,
Eli.

Answer 1

from Troubleshoot error messages | Bootstrapper CS5, CS5.5
You are already running another installer
Only one Adobe Creative Suite 5 or CS5.5 installation can run a time. Otherwise, one of the following error messages appears:
“You are already running another Adobe installer. Please close other installer and select Retry option.” 
“Other instances of Adobe Application Manager are running. To continue, installer needs to close those instances. Do you want to continue?”
Click Quit (for the first message) or No (for the second message) to exit the installer.  
Close other Adobe setups:  
Windows  
Right-click the taskbar and select Task Manager.  
Select the Processes tab, and select Show Processes From All Users.  
Select any PDapp.exe or setup.exe process, and click End Process.  
Repeat for all additional instances of PDapp.exe or setup.exe processes.  
Mac OS  
Press Command + Option + Esc.
In the Force Quit Applications window, select PDapp or Adobe Setup and click Force Quit.
Repeat for all additional instances of the applications.
Retry the installer.