diff --git a/Sources/avif/AVIFEncoder.swift b/Sources/avif/AVIFEncoder.swift
index 10d3410..2c926fa 100644
--- a/Sources/avif/AVIFEncoder.swift
+++ b/Sources/avif/AVIFEncoder.swift
@@ -47,16 +47,17 @@ public class AVIFEncoder {
         assert(size.width > 0 && size.height > 0, "You cannot safely scale an image to a zero width or height")
         
         #if os(macOS)
-        let destSize = NSMakeSize(CGFloat(size.width), CGFloat(size.height))
-        let newImage = NSImage(size: destSize)
-        newImage.lockFocus()
-        image.draw(in: NSMakeRect(0, 0, destSize.width, destSize.height),
-                   from: NSMakeRect(0, 0, image.size.width, image.size.height),
-                   operation: NSCompositingOperation.copy,
-                   fraction: CGFloat(1))
-        newImage.unlockFocus()
-        newImage.size = destSize
-        return NSImage(data: newImage.tiffRepresentation!)!
+        let newWidth = size.width * (scale ?? 1)
+        let newHeight = size.height * (scale ?? 1)
+
+        // Create a new NSSize object with the newly calculated size
+        let newSize = NSSize(width: newWidth.rounded(.down), height: newHeight.rounded(.down))
+
+        // Cast the NSImage to a CGImage
+        var imageRect = CGRect(origin: .zero, size: size)
+        guard let imageRef = image.cgImage(forProposedRect: &imageRect, context: nil, hints: nil) else { return image }
+
+        return NSImage(cgImage: imageRef, size: newSize)
         #else
         UIGraphicsBeginImageContextWithOptions(size, false, scale ?? image.scale)
         image.draw(in: CGRect(origin: .zero, size: size))
diff --git a/Sources/avifc/AVIFAnimatedDecoder.mm b/Sources/avifc/AVIFAnimatedDecoder.mm
index ef75eb3..eba7998 100644
--- a/Sources/avifc/AVIFAnimatedDecoder.mm
+++ b/Sources/avifc/AVIFAnimatedDecoder.mm
@@ -48,6 +48,7 @@ -(nullable id)initWithData:(nonnull NSData*)data {
     avifResult decodeResult = avifDecoderParse(_idec);
     if (decodeResult != AVIF_RESULT_OK) {
         avifDecoderDestroy(_idec);
+        _idec = nullptr;
         return nil;
     }
     return self;
diff --git a/Sources/avifc/half.hpp b/Sources/avifc/half.hpp
index 841b9a8..2f2e97e 100644
--- a/Sources/avifc/half.hpp
+++ b/Sources/avifc/half.hpp
@@ -24,6 +24,12 @@
 #ifndef HALF_HALF_HPP
 #define HALF_HALF_HPP
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Weverything"
+#pragma clang diagnostic ignored "-Wunused-value"
+#pragma clang diagnostic ignored "-Wunused-result"
+#pragma clang diagnostic pop
+
 #define HALF_GCC_VERSION (__GNUC__*100+__GNUC_MINOR__)
 
 #if defined(__INTEL_COMPILER)