About a year ago, I replaced my 2010 MacBook Pro's HDD with an SSD. I used Carbon Copy Cloner to copy the data to the SSD. The HDD has been set aside. Since that time, I've installed various Apple updates but haven't upgraded to El Capitan yet. I'm about to upgrade to a newer MacBook Pro. I have a buyer for the 2010 model but they want the original equipment; i.e, the HDD. So I'm planning to remove the SSD and re-install the HDD. Afterward, I want to confirm that the system boots properly. I'm hoping that OS X will boot off the re-installed HDD without an issue ... and that it will prompt me to re-install all the updates. Will I run into any problems doing this?