This is what I found in Apple support and it worked for me. BTW. I lost my Mail sharing option after I installed El Capitan.
If sharing options and Markup are missing after you install OS X Yosemite
If Share button options (Email This Page, Facebook, etc.) or the Markup feature are missing after you install OS X Yosemite, follow the instructions below.
Follow these steps in each user account on your Mac to restore Share button options and the Markup feature.
- Open the Terminal app. You can launch Terminal from the Other folder in Launchpad, or enter "Terminal" in Spotlight search.
- Copy and paste this command into the Terminal window:/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/ LaunchServices.framework/Versions/A/Support/lsregister -kill -seed
- Press Return and wait for the Terminal prompt (ends in $) to reappear. It may take a few minutes.
- Close the Terminal app.
If you have another user account on your Mac that has this issue, log into that account and repeat these steps.
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Last Modified: Feb 13, 2015