Please provide the exact dot version of the software & OS installed at your system .Also check whether is there any update available for the software after going through "help > check for updates "
Follow this thread to reset the preferences for the Acrobat software :- How to reset Preference settings in Acrobat.
Is this happening while working with all files or certain once.
Also check with different user account with admin Rights to replicate the issue.
Mac OS 10.11
Adobe Acrobat Pro DC
Brand new download and it is slow!!!
Please after uninstalling & reinstalling the program.