This patch will only remove USB 3.0 15 ports limit for AppleUSBXHCIPCI.kext
Since it is derived from beta MacOS, it is still under testing. Use it at your risk and good luck!
Binary patch description (Hex & Assembly Codes):
0000000000003b21 cmpl $0x10, -0x6c(%rbp)83 7d 94 10-->0000000000003b21 cmpl $0x16, -0x6c(%rbp)83 7d 94 16
Credit to arix98.