As Acrobat's interface and the pdf files are blurry on your Mac machine, could you check if an update is available for Acrobat using "Check for updates" option under "Help" menu, reboot the machine after installing update and check.
Also, try the troubleshooting steps given in the following help document-
Let us know if you need any help.
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Could you try performing the troubleshooting steps given in the help document given below:
Also, try downloading and installing the updates manually from this link: Adobe - Acrobat : For Macintosh, reboot the machine after installing the update.