You can use any version of Xcode 12 and iOS 14 SDK. To develop apps with this release of ArcGIS Runtime SDK for iOS, you need an Intel or Apple silicon based Mac computer running an operating system listed below: For older system requirements, see past guide versions in PDF format on the downloads page (requires sign-in).
System requirements for recent previous releases are linked to from the bottom of this page.
This page lists system requirements for the 100.11.0 release of ArcGIS Runtime SDK for iOS.