diff --git a/LLama.Unittest/BasicTest.cs b/LLama.Unittest/BasicTest.cs
index 64fa4d0f..1d54a7e9 100644
--- a/LLama.Unittest/BasicTest.cs
+++ b/LLama.Unittest/BasicTest.cs
@@ -18,7 +18,7 @@ namespace LLama.Unittest
             _params = new ModelParams(Constants.GenerativeModelPath)
             {
                 ContextSize = 2048,
-                GpuLayerCount = 0
+                GpuLayerCount = Constants.CIGpuLayerCount
             };
             _model = LLamaWeights.LoadFromFile(_params);
         }
diff --git a/LLama.Unittest/BeamTests.cs b/LLama.Unittest/BeamTests.cs
index 6ae0adbf..88b25672 100644
--- a/LLama.Unittest/BeamTests.cs
+++ b/LLama.Unittest/BeamTests.cs
@@ -18,7 +18,7 @@ public sealed class BeamTests
         _params = new ModelParams(Constants.GenerativeModelPath)
         {
             ContextSize = 2048,
-            GpuLayerCount = 0,
+            GpuLayerCount = Constants.CIGpuLayerCount,
         };
         _model = LLamaWeights.LoadFromFile(_params);
     }
diff --git a/LLama.Unittest/Constants.cs b/LLama.Unittest/Constants.cs
index 6e5e92c5..8a496f6e 100644
--- a/LLama.Unittest/Constants.cs
+++ b/LLama.Unittest/Constants.cs
@@ -1,4 +1,6 @@
-namespace LLama.Unittest
+using System.Runtime.InteropServices;
+
+namespace LLama.Unittest
 {
     internal static class Constants
     {
@@ -8,5 +10,25 @@
         public static readonly string LLavaModelPath = "Models/llava-v1.6-mistral-7b.Q3_K_XS.gguf";
         public static readonly string LLavaMmpPath = "Models/mmproj-model-f16.gguf";
         public static readonly string LLavaImage = "Models/extreme-ironing-taxi-610x427.jpg";
+
+        /// <summary>
+        /// Calculate GpuLayer Count to use in UnitTest
+        /// </summary>
+        /// <returns> Defaults to 20 in all the cases, except IOS release (to disable METAL on github CI)</returns>
+        public static int CIGpuLayerCount
+        {
+            get
+            {
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                {
+                    #if DEBUG
+                      return 20;
+                    #else
+                      return 0;                      
+                    #endif
+                }
+                else return 20;
+            }
+        }
     }
 }
diff --git a/LLama.Unittest/GrammarTest.cs b/LLama.Unittest/GrammarTest.cs
index db4372b0..d4f6a95b 100644
--- a/LLama.Unittest/GrammarTest.cs
+++ b/LLama.Unittest/GrammarTest.cs
@@ -16,7 +16,7 @@ namespace LLama.Unittest
             {
                 ContextSize = 2048,
                 Seed = 92,
-                GpuLayerCount = 0,                
+                GpuLayerCount = Constants.CIGpuLayerCount,                
             };
             _model = LLamaWeights.LoadFromFile(_params);
         }
diff --git a/LLama.Unittest/LLamaContextTests.cs b/LLama.Unittest/LLamaContextTests.cs
index bd02ef7b..cc53e369 100644
--- a/LLama.Unittest/LLamaContextTests.cs
+++ b/LLama.Unittest/LLamaContextTests.cs
@@ -14,7 +14,7 @@ namespace LLama.Unittest
             var @params = new ModelParams(Constants.GenerativeModelPath)
             {
                 ContextSize = 768,
-                GpuLayerCount = 0
+                GpuLayerCount = Constants.CIGpuLayerCount,
             };
             _weights = LLamaWeights.LoadFromFile(@params);
             _context = _weights.CreateContext(@params);
diff --git a/LLama.Unittest/LLamaEmbedderTests.cs b/LLama.Unittest/LLamaEmbedderTests.cs
index 604e2bd1..570c6c12 100644
--- a/LLama.Unittest/LLamaEmbedderTests.cs
+++ b/LLama.Unittest/LLamaEmbedderTests.cs
@@ -19,7 +19,7 @@ public sealed class LLamaEmbedderTests
             ContextSize = 4096,
             Threads = 5,
             Embeddings = true,
-            GpuLayerCount = 0
+            GpuLayerCount = Constants.CIGpuLayerCount,
         };
         using var weights = LLamaWeights.LoadFromFile(@params);
         _embedder = new(weights, @params);
diff --git a/LLama.Unittest/LLavaWeightsTests.cs b/LLama.Unittest/LLavaWeightsTests.cs
index 2c21a7a1..30d41fd9 100644
--- a/LLama.Unittest/LLavaWeightsTests.cs
+++ b/LLama.Unittest/LLavaWeightsTests.cs
@@ -18,7 +18,7 @@ namespace LLama.Unittest
             {
                 // Llava models requires big context
                 ContextSize = 4096,
-                GpuLayerCount = 0                
+                GpuLayerCount = Constants.CIGpuLayerCount,                
             };
             _llamaWeights = LLamaWeights.LoadFromFile(@params);
             _lLavaWeights = LLavaWeights.LoadFromFile(Constants.LLavaMmpPath);
diff --git a/LLama.Unittest/MemoryDisposalTests.cs b/LLama.Unittest/MemoryDisposalTests.cs
index 1bcc7edc..60cd75fd 100644
--- a/LLama.Unittest/MemoryDisposalTests.cs
+++ b/LLama.Unittest/MemoryDisposalTests.cs
@@ -25,7 +25,7 @@ public class MemoryDisposalTests
         var @params = new ModelParams(Constants.GenerativeModelPath)
         {
             ContextSize = 2048,
-            GpuLayerCount = 0            
+            GpuLayerCount = Constants.CIGpuLayerCount,            
         };
         var model = LLamaWeights.LoadFromFile(@params);
 
diff --git a/LLama.Unittest/StatelessExecutorTest.cs b/LLama.Unittest/StatelessExecutorTest.cs
index ab979471..18f3c25d 100644
--- a/LLama.Unittest/StatelessExecutorTest.cs
+++ b/LLama.Unittest/StatelessExecutorTest.cs
@@ -20,7 +20,7 @@ namespace LLama.Unittest
                 ContextSize = 60,
                 Seed = 1754,
                 BatchSize = 2,
-                GpuLayerCount = 0,                
+                GpuLayerCount = Constants.CIGpuLayerCount,                
             };
             _weights = LLamaWeights.LoadFromFile(_params);
         }
diff --git a/LLama.Unittest/TokenTests.cs b/LLama.Unittest/TokenTests.cs
index 19118bf8..03e3927f 100644
--- a/LLama.Unittest/TokenTests.cs
+++ b/LLama.Unittest/TokenTests.cs
@@ -15,7 +15,7 @@ public sealed class TokenTests
         _params = new ModelParams(Constants.GenerativeModelPath)
         {
             ContextSize = 2048,
-            GpuLayerCount = 0,
+            GpuLayerCount = Constants.CIGpuLayerCount,
         };
         _model = LLamaWeights.LoadFromFile(_params);
     }