If it's just guitar you need to get into your iOS device, I don't think you can go wrong with IK Multimedia iRig HD2. It will reliably get your guitar into your iOS Device and your Mac.
https://www.amazon.com/IK-Multimedia-digital-interface-IP-IRIG-HD2/dp/B01KPYGBR6/ref=sr_1_1_sspa?keywords=irig+HD2&qid=1579550673&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzSkMyMVkwRDY0NUhRJmVuY3J5cHRlZElkPUEwNTU3OTYxNjVFUzEwSzlXRDIzJmVuY3J5cHRlZEFkSWQ9QTAzODgwMDIxV1o0QUJRTEVOWVRLJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==