Q: I've downloaded el capitan but I don't have the option to install it om my MacBook Pro.  It installed OK on my iMac

Hey Chris, 

I understand that you have downloaded El Capitan but are not seeing the installer pop up to finish the installer. That is easy as all you need to do is look for the app downloaded in the Applications folder or by opening Launchpad and look for the installer there. Take a look at the article below for more details.

Mac Basics: Launchpad is the fast way to find and open your apps
https://support.apple.com/en-us/HT202635

Take it easy

Hi Chris, 

That is great news that you found the installer. I hope you are liking OS X El Capitan.

Take care.