I'm having problems installing iPadOS 13 on my iPad Pro 9.7 1st Gen. I am using macOS Mojave 10.14.6 with iTunes. I already have the MobileDevice.pkg installed. I was able to install iOS 13 to my iPhone XS without any problems using iTunes, but when trying to install it on my iPad numerous times, I keep getting error encountered (14). Which says it can be due to a faulty USB slot/cable or a corrupt ipsw file. I tried redownloading the file numerous times and from multiple sources to see if that would resolve it and it's still giving me the same error. I know there's nothing wrong with my USB cable or slot because I am able to update/restore the iPad back to iOS 12.3.1, and also I was using the same exact cable to update my iPhone to iOS 13 without any problems.
Is there a unique method that one must use to update the iPad Pro 9.7 1st Gen to iPadOS 13 that I'm unaware of? What I'm doing is OPTION+CLICK on the update button and locating my IPSW file, and then it verifies the file with apple and continues to update the ipad, about 85% through the process it pops up the window giving me the error encountered (14) message, sometimes it would show up even sooner at around 25%-50% through the process.