Device.systemVersion

Версия операционной системы, которая в настоящее время запущена на устройстве.

Версия iOS в виде строки: major.minor или major.minor.patch (например, "14.0", "8.0.2"). Используйте System.Version или Version.TryParse для сравнения.

using UnityEngine;
using UnityEngine.iOS;

public class SystemVersionExample : MonoBehaviour
{
    bool allowFeature = true;

    void Start()
    {
        // Get the iOS version of the device this is running on
        string systemVersion = Device.systemVersion;

        // Separate the version string to major and minor version numbers
        string[] separatedVersion = systemVersion.Split('.');

        // Parse the major version number to an integer that can be used for comparison
        int majorVersion = int.Parse(separatedVersion[0]);

        // Check if major version number of the device this is running on is below iOS 12
        if (majorVersion < 12)
        {
            // Log a message and disable the version-specific features.
            Debug.Log("Sorry, this amazing feature requires iOS 12 and above to work. Please update your iOS version.");
            allowFeature = false;
        }
    }
}