Using the uninstaller to remove Shareport and then re-installing version 4.6 did allow the installation to complete without any errors. However, although my Epson printer appears in the Shareport list, when I try to connect I get the connection failed message. I am using a MacBook Pro 15" early 2011 12 gb RAM with OS X 10.11.1. (My older Macbook Pro with Yosemite can connect without issues, as this PC could before upgrading the OS.)