Cannot install Acrobat DC on Mac OS 10.9.5 (SafariNotificationAgent running)

Question

I cannot update the Acrobat to DC version since it said that I must close 'SafariNotificationAgent' to continue. But when I go to Activity Monitor, it seems like a process of system which cannot be quitted. And when I try to force quit it, the install process freezes at 35% from finishing. It must be a failure of either the application or my OS X system...... So I cannot help but looking for some method for resolving it.

Answer 1

I tried this method (both) but nothing work. My last retry comes with a failure message:
And here is the error summary:
Exit Code: 7
Please see specific errors below for troubleshooting. For example, ERROR: DW013 ...
-------------------------------------- Summary --------------------------------------
- 0 fatal error(s), 6 error(s)
ERROR: -------------------- BEGIN - Initialization Failures - BEGIN --------------------
ERROR: Fatal error initializing from proxy files.
ERROR: The following proxy files could not be loaded
ERROR: /tmp/9C1C0B46-93AB-4102-A004-7190EC5DF0E8/proxy.xml
ERROR: -------------------- END - Initialization Failures - END --------------------
ERROR: DW013: Cannot initialize payload session
It seems like the problem of my OS X (I know my system is buggy all the way). Looking for method to fix it.