diff --git a/Sources/SwiftPlus/Extensions/Character.swift b/Sources/SwiftPlus/Extensions/Character.swift
index a7f1b86..a775762 100644
--- a/Sources/SwiftPlus/Extensions/Character.swift
+++ b/Sources/SwiftPlus/Extensions/Character.swift
@@ -9,6 +9,7 @@ import Foundation
 
 public extension Character {
     /// A simple emoji is one scalar and presented to the user as an Emoji
+    @available(macOS 10.12.2, *)
     @available(iOS 10.2, *)
     var isSimpleEmoji: Bool {
         guard let firstScalar = unicodeScalars.first else { return false }
@@ -16,9 +17,11 @@ public extension Character {
     }
 
     /// Checks if the scalars will be merged into an emoji
+    @available(macOS 10.12.2, *)
     @available(iOS 10.2, *)
     var isCombinedIntoEmoji: Bool { unicodeScalars.count > 1 && unicodeScalars.first?.properties.isEmoji ?? false }
 
+    @available(macOS 10.12.2, *)
     @available(iOS 10.2, *)
     var isEmoji: Bool { isSimpleEmoji || isCombinedIntoEmoji }
 }
diff --git a/Sources/SwiftPlus/Extensions/String.swift b/Sources/SwiftPlus/Extensions/String.swift
index 3414bac..a010b35 100644
--- a/Sources/SwiftPlus/Extensions/String.swift
+++ b/Sources/SwiftPlus/Extensions/String.swift
@@ -92,23 +92,29 @@ public extension String {
     }
     
     /// Returns true if `String` is only a single emoji
+    @available(macOS 10.12.2, *)
     @available(iOS 10.2, *)
     var isSingleEmoji: Bool { count == 1 && containsEmoji }
     
     /// Returns true if `String` contains at least one emoji
+    @available(macOS 10.12.2, *)
     @available(iOS 10.2, *)
     var containsEmoji: Bool { contains { $0.isEmoji } }
     
     /// Returns true if `String` contains only emojiĀ“s
+    @available(macOS 10.12.2, *)
     @available(iOS 10.2, *)
     var containsOnlyEmoji: Bool { !isEmpty && !contains { !$0.isEmoji } }
     
+    @available(macOS 10.12.2, *)
     @available(iOS 10.2, *)
     var emojiString: String { emojis.map { String($0) }.reduce("", +) }
     
+    @available(macOS 10.12.2, *)
     @available(iOS 10.2, *)
     var emojis: [Character] { filter { $0.isEmoji } }
     
+    @available(macOS 10.12.2, *)
     @available(iOS 10.2, *)
     var emojiScalars: [UnicodeScalar] { filter { $0.isEmoji }.flatMap { $0.unicodeScalars } }
 }