Upgrade Acrobat Pro 11.0.0 on Macbook Pro OS Yosemite 10.10.5

At the very least you should update the application to the latest version available, which is 11.0.23. Updates are available here:

ftp://ftp.adobe.com/pub/adobe/reader/mac/11.x/

Hi Khench

We are sorry for the trouble. As described the application unexpectedly quites each time you open it. 

Adobe Acrobat 11 Pro is an old and EOL application it may or may not work properly. Adobe strongly recommends that you upgrade to the latest versions of Adobe Acrobat DC and Adobe Acrobat Reader DC. By upgrading installations to the latest versions, you benefit from the latest functional enhancements and improved security measures.

For more information please take a look at the help page https://helpx.adobe.com/in/acrobat/kb/end-of-support-acrobat-xi-reader-xi.html

Also, the version of the Mackbook pro is EOL and no logner supported by apple. You might consider upgrading the Mac OS to the latest version available.

Regards

Amal