diff --git a/build-tools/src/main/kotlin/org/jetbrains/kotlin/PlatformInfo.kt b/build-tools/src/main/kotlin/org/jetbrains/kotlin/PlatformInfo.kt
index 67a5e16ee57..4d77f67f85b 100644
--- a/build-tools/src/main/kotlin/org/jetbrains/kotlin/PlatformInfo.kt
+++ b/build-tools/src/main/kotlin/org/jetbrains/kotlin/PlatformInfo.kt
@@ -37,5 +37,24 @@ object PlatformInfo {
         return platformManager.targetManager(targetName).target
     }
 
+    @JvmStatic
+    fun checkXcodeVersion(project: Project) {
+        val properties = PropertiesProvider(project)
+        val requiredMajorVersion = properties.xcodeMajorVersion
+
+        if (!DependencyProcessor.isInternalSeverAvailable
+                && properties.checkXcodeVersion
+                && requiredMajorVersion != null
+        ) {
+            val currentXcodeVersion = Xcode.current.version
+            val currentMajorVersion = currentXcodeVersion.splitToSequence('.').first()
+            if (currentMajorVersion != requiredMajorVersion) {
+                throw IllegalStateException(
+                        "Incorrect Xcode version: ${currentXcodeVersion}. Required major Xcode version is ${requiredMajorVersion}."
+                )
+            }
+        }
+    }
+
     fun unsupportedPlatformException() = TargetSupportException()
 }
\ No newline at end of file
diff --git a/build-tools/src/main/kotlin/org/jetbrains/kotlin/PropertiesProvider.kt b/build-tools/src/main/kotlin/org/jetbrains/kotlin/PropertiesProvider.kt
new file mode 100644
index 00000000000..8dfc98583c9
--- /dev/null
+++ b/build-tools/src/main/kotlin/org/jetbrains/kotlin/PropertiesProvider.kt
@@ -0,0 +1,31 @@
+package org.jetbrains.kotlin
+
+import org.gradle.api.Project
+import java.util.*
+
+class PropertiesProvider(val project: Project) {
+    private val localProperties by lazy {
+        Properties().apply {
+            project.file("local.properties").takeIf { it.isFile }?.inputStream()?.use {
+                load(it)
+            }
+        }
+    }
+
+    fun findProperty(name: String): Any? =
+            project.findProperty(name) ?: localProperties.getProperty(name)
+
+    fun getProperty(name: String): Any =
+            findProperty(name) ?: throw IllegalArgumentException("No such property: $name")
+
+    fun hasProperty(name: String): Boolean =
+            project.hasProperty(name) || localProperties.containsKey(name)
+
+    val xcodeMajorVersion: String?
+        get() = findProperty("xcodeMajorVersion") as String?
+
+    val checkXcodeVersion: Boolean
+        get() = findProperty("checkXcodeVersion")?.let {
+            it == "true"
+        } ?: true
+}
diff --git a/build.gradle b/build.gradle
index d90e89a3fa4..8b3e9c8de68 100644
--- a/build.gradle
+++ b/build.gradle
@@ -55,6 +55,10 @@ defaultTasks 'clean', 'dist'
 
 convention.plugins.platformInfo = PlatformInfo
 
+if (isMac()) {
+    checkXcodeVersion(project)
+}
+
 ext {
     distDir = file('dist')
     dependenciesDir = DependencyProcessor.defaultDependenciesRoot
diff --git a/gradle.properties b/gradle.properties
index cdc5356dc4a..04432e7ba6e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-# A version of the Kotlin "toolchain" (compiler, runtime, stdlib etc) used by the build script.
+# A version of the Kotlin compiler that is used to build Kotlin/Native.
 buildKotlinVersion=1.3.70-dev-1070
 buildKotlinCompilerRepo=https://teamcity.jetbrains.com/guestAuth/app/rest/builds/buildType:(id:Kotlin_KotlinPublic_Compiler),number:1.3.70-dev-1070,branch:default:any,pinned:true/artifacts/content/maven
 remoteRoot=konan_tests
@@ -25,6 +25,10 @@ kotlinStdlibVersion=1.3.70-dev-1244
 kotlinStdlibTestsVersion=1.3.70-dev-1244
 testKotlinCompilerVersion=1.3.70-dev-1244
 konanVersion=1.3.70
+
+# A version of Xcode required to build the Kotlin/Native compiler.
+xcodeMajorVersion=11
+
 org.gradle.jvmargs='-Dfile.encoding=UTF-8'
 org.gradle.workers.max=4
 
diff --git a/shared/src/main/kotlin/org/jetbrains/kotlin/konan/util/DependencyProcessor.kt b/shared/src/main/kotlin/org/jetbrains/kotlin/konan/util/DependencyProcessor.kt
index 171d5d2a319..29d3b7543a1 100644
--- a/shared/src/main/kotlin/org/jetbrains/kotlin/konan/util/DependencyProcessor.kt
+++ b/shared/src/main/kotlin/org/jetbrains/kotlin/konan/util/DependencyProcessor.kt
@@ -220,6 +220,9 @@ class DependencyProcessor(dependenciesRoot: File,
 
         val defaultDependencyCacheDir: File
             get() = localKonanDir.resolve("cache")
+
+        val isInternalSeverAvailable: Boolean
+            get() = InternalServer.isAvailable
     }
 
     private val resolvedDependencies = dependencyToCandidates.map { (dependency, candidates) ->
@@ -278,7 +281,7 @@ class DependencyProcessor(dependenciesRoot: File,
 
 internal object InternalServer {
     private val host = "repo.labs.intellij.net"
-    val url = "http://$host/kotlin-native"
+    val url = "https://$host/kotlin-native"
 
     private val internalDomain = "labs.intellij.net"