Error 86 occurs when you try to install or update an Adobe application, but the process is blocked because another instance of the installer or the Creative Cloud desktop app is already running. This usually happens if a previous installation didn’t close properly or is still running in the background.
To resolve the issue, follow these steps to close the installer instance properly for your operating system:
Press Ctrl + Shift + Esc to open the Task Manager
Navigate to the Processes tab.
Locate and right-click the reported app on the list.
Select End Task to close this application.
Select Retry to download the Creative Cloud app again.
In the Finder, select Go > Utilities.
Double-click Activity Monitor.
From the menu bar, select View > All Processes.
In the search box, type the name of the process you want to close.
Double-click the conflicting process from the list and select Quit.
If prompted, select Force Quit to end the selected process.
Repeat steps 4 to 6 for any additional conflicting processes.
Select Retry to update the Creative Cloud app again.
