For instructions, see Enabling and using the "root" user in Mac OS X on the Apple website.
After enabling the root user account, log in to the root user account and retry updating Acrobat or Reader.
The log file is a file generated and appended to at runtime with status, operational, and error information describing what the Updater is doing. In the case of installation failures, check the updater log file to know the reason of failure.
Log location Macintosh (Reader): Your version of cannot be updated because the application contents have been changed.
It includes general operating system fixes that smooth out some bugs and also seems to fix a common issue where battery life was not displaying correctly for some users.
Specifically, it: Resolves an issue that may cause Migration Assistant to unexpectedly quit Improves compatibility when connecting to a Microsoft Exchange server in Mail Addresses an issue playing audio through a Thunderbolt display Resolves an issue that could prevent i Messages from being sent Addresses an issue that could cause the system to become unresponsive when using Pinyin input Resolves an issue when connecting to SMB servers with long names Addresses a issue that may prevent Safari from launching when using a Proxy Automatic Configuration (PAC) file Improves 802.1X authentication with Active Directory credentials.
For step-by-step installation instructions, see Install Adobe Acrobat Reader DC | Mac OS.