I'm happy that things worked out for you. An alternative method is to make a clone using SuperDuper or Carbon Copy Cloner just before installing 10.9. You can always clone back if necessary.


Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365