diff --git a/Sources/SwiftAutoLayout.swift b/Sources/SwiftAutoLayout.swift
index a781a17..8857b40 100644
--- a/Sources/SwiftAutoLayout.swift
+++ b/Sources/SwiftAutoLayout.swift
@@ -108,7 +108,7 @@ public extension LayoutRegion {
 }
 
 public extension View {
-    public var baseline: LayoutItem<YAxis> { return layoutItem(self, .Baseline) }
+    public var baseline: LayoutItem<YAxis> { return layoutItem(self, .LastBaseline) }
     
     @available(iOS 8.0, OSX 10.11, *)
     public var firstBaseline: LayoutItem<YAxis> { return layoutItem(self, .FirstBaseline) }
@@ -149,7 +149,11 @@ public extension UIView {
 infix operator ~ { associativity left precedence 120 }
 
 public func ~(lhs: NSLayoutConstraint, rhs: LayoutPriority) -> NSLayoutConstraint {
-    let newConstraint = NSLayoutConstraint(item: lhs.firstItem, attribute: lhs.firstAttribute, relatedBy: lhs.relation, toItem: lhs.secondItem, attribute: lhs.secondAttribute, multiplier: lhs.multiplier, constant: lhs.constant)
+    #if os(OSX)
+    let newConstraint = NSLayoutConstraint(item: lhs.firstItem!, attribute: lhs.firstAttribute, relatedBy: lhs.relation, toItem: lhs.secondItem, attribute: lhs.secondAttribute, multiplier: lhs.multiplier, constant: lhs.constant)
+    #else
+        let newConstraint = NSLayoutConstraint(item: lhs.firstItem, attribute: lhs.firstAttribute, relatedBy: lhs.relation, toItem: lhs.secondItem, attribute: lhs.secondAttribute, multiplier: lhs.multiplier, constant: lhs.constant)
+    #endif
     newConstraint.priority = rhs
     return newConstraint
 }
diff --git a/SwiftAutoLayout.podspec b/SwiftAutoLayout.podspec
new file mode 100644
index 0000000..10f139c
--- /dev/null
+++ b/SwiftAutoLayout.podspec
@@ -0,0 +1,14 @@
+Pod::Spec.new do |s|
+  s.name         = "SwiftAutoLayout"
+  s.version      = "1.0.0"
+  s.summary      = "Tiny Swift SDL for Autolayout"
+  s.homepage     = "https://github.com/indragiek/SwiftAutoLayout"
+  s.author	     = { "Indragie Karunatne" => "i@indragie.com" }
+  s.license      = "MIT"
+  s.ios.deployment_target = "8.0"
+  s.osx.deployment_target = "10.9"
+  s.source       = { :git => "https://github.com/indragiek/SwiftAutoLayout.git", :tag => "#{s.version}" }
+  s.source_files = "Sources/*.{swift}"
+  s.ios.framework = "UIKit"
+  s.osx.framework = "Cocoa"
+end