Make sure you have this at hand before attempting an upgrade. Will NOT work with Yosemite, El Capitan or Sierra Microsoft Office 2011 or EarlierĪfter cloning early versions of Office to a new HDD or SSD, sometimes the office Activation key is sometimes requested. Only CC (Creative Cloud) is guaranteed to work on El Capitan and Sierra.They will NOT work with El Capitan or Sierra. Adobe CS6 will work on OS up OS X 10.10/Yosemite.They will NOT work with Yosemite, El Capitan or Sierra. Adobe CS2, CS3, CS4, CS5 will ONLY work with OS X 10.9/Mavericks or earlier.However, you may not be able to upgrade the OS if you are running any of the following non-apple software products.

Increasing speed and performance by up to 400% is possible on older Macs by replacing the HDD with an SSD or a new HDD. Upgrading Mac OS (to High Sierra or Mojave) may not be possible if you are still running older versions of some non-apple software