diff --git a/src/pyFAI/detectors/_common.py b/src/pyFAI/detectors/_common.py
index 0f6e4b5f3..98eb27b5c 100644
--- a/src/pyFAI/detectors/_common.py
+++ b/src/pyFAI/detectors/_common.py
@@ -33,7 +33,7 @@
 __contact__ = "Jerome.Kieffer@ESRF.eu"
 __license__ = "MIT"
 __copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
-__date__ = "16/11/2025"
+__date__ = "21/11/2025"
 __status__ = "stable"
 
 import logging
@@ -890,7 +890,7 @@ def save(self, filename):
             if self.delta_dummy is not None:
                 det_grp["delta_dummy"] = self.delta_dummy
             det_grp.create_dataset("pixel_size",
-                data=numpy.array([self.pixel1, self.pixel2], dtype=numpy.float32),
+                data=numpy.array([self.pixel1, self.pixel2], dtype=numpy.float64),
                 ).attrs["unit"]="m"
 
             det_grp["force_pixel"] = self.force_pixel
diff --git a/src/pyFAI/ext/CSR_common.pxi b/src/pyFAI/ext/CSR_common.pxi
index e1c749f22..784a39bbd 100644
--- a/src/pyFAI/ext/CSR_common.pxi
+++ b/src/pyFAI/ext/CSR_common.pxi
@@ -29,7 +29,7 @@
 
 __author__ = "Jérôme Kieffer"
 __contact__ = "Jerome.kieffer@esrf.fr"
-__date__ = "12/03/2025"
+__date__ = "21/11/2025"
 __status__ = "stable"
 __license__ = "MIT"
 
@@ -60,15 +60,17 @@ cdef struct float4_t:
     float s3
 float4_d = numpy.dtype([('s0','f4'),('s1','f4'),('s2','f4'),('s3','f4')])
 
+
 cdef inline bool cmp(float4_t a, float4_t b) noexcept nogil:
     return True if a.s0<b.s0 else False
 
+
 cdef inline void sort_float4(float4_t[::1] ary) noexcept nogil:
     "Sort in place of an array of float4 along first element (s0)"
     cdef:
         int size
     size = ary.shape[0]
-    sort(&ary[0], &ary[size-1]+1, cmp)
+    sort(&ary[0], &ary[size-1]+1, &cmp)
 
 
 cdef class CsrIntegrator(object):
diff --git a/src/pyFAI/opencl/preproc.py b/src/pyFAI/opencl/preproc.py
index 4de361a9f..bacdd42bc 100644
--- a/src/pyFAI/opencl/preproc.py
+++ b/src/pyFAI/opencl/preproc.py
@@ -31,7 +31,7 @@
 
 __author__ = "Jérôme Kieffer"
 __license__ = "MIT"
-__date__ = "07/10/2025"
+__date__ = "21/11/2025"
 __copyright__ = "2015-2025, ESRF, Grenoble"
 __contact__ = "jerome.kieffer@esrf.fr"
 
@@ -342,8 +342,12 @@ def compile_kernels(self, kernel_files=None):
         # concatenate all needed source files into a single openCL module
         kernel_files = kernel_files or self.kernel_files
         # Explicit handling of fp64 since Apple silicon compiler wrongly clams fp64 support see issue #2339
+        compile_options = f"-D NIMAGE={self.size}"
         fp64_support = 1 if "cl_khr_fp64" in self.ctx.devices[0].extensions else 0
-        compile_options = f"-D NIMAGE={self.size} -D cl_khr_fp64={fp64_support}"
+        platform = self.ctx.devices[0].platform
+        if not(platform.name == "Apple" and platform.get_devices()[0].type == 2):
+            # not Apple CPU
+            compile_options += f" -D cl_khr_fp64={fp64_support}"
         OpenclProcessing.compile_kernels(self, kernel_files, compile_options)
 
     def send_buffer(self, data, dest, convert=True):
diff --git a/src/pyFAI/opencl/test/test_peak_finder.py b/src/pyFAI/opencl/test/test_peak_finder.py
index 651f8395f..59699bb7c 100644
--- a/src/pyFAI/opencl/test/test_peak_finder.py
+++ b/src/pyFAI/opencl/test/test_peak_finder.py
@@ -33,7 +33,7 @@
 __contact__ = "jerome.kieffer@esrf.eu"
 __license__ = "MIT"
 __copyright__ = "2020-2021 European Synchrotron Radiation Facility, Grenoble, France"
-__date__ = "21/05/2024"
+__date__ = "21/11/2025"
 
 import logging
 import numpy
@@ -167,6 +167,10 @@ def test_peakfinder(self):
         """
         test for peakfinder
         """
+        valid_opencl = False if ocl.get_platform("Apple") else True
+        if not valid_opencl:
+            self.skipTest("Apple platform detected")
+
         unit = "r_m"
         msk = self.img < 0
         engine = self.ai.setup_sparse_integrator(self.img.shape, 1000, mask=msk, split="no", algo="CSR", unit=unit)
diff --git a/src/pyFAI/test/test_azimuthal_integrator.py b/src/pyFAI/test/test_azimuthal_integrator.py
index fcc143e17..d83c7ccb0 100644
--- a/src/pyFAI/test/test_azimuthal_integrator.py
+++ b/src/pyFAI/test/test_azimuthal_integrator.py
@@ -33,7 +33,7 @@
 __contact__ = "Jerome.Kieffer@ESRF.eu"
 __license__ = "MIT"
 __copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
-__date__ = "10/10/2025"
+__date__ = "21/11/2025"
 
 import unittest
 import os
@@ -262,8 +262,14 @@ def test_separate(self):
     def test_medfilt1d(self):
         N = 1000
         param = {"unit": "2th_deg"}
-        # legacy version"
         if UtilsTest.opencl and pyopencl:
+            import pyFAI.opencl
+            valid_opencl = False if pyFAI.opencl.ocl.get_platform("Apple") else True
+        else:
+            valid_opencl = False
+
+        # legacy version"
+        if valid_opencl:
             with logging_disabled(logging.WARNING):
                 ref = self.ai.medfilt1d_legacy(self.data, N, method="bbox_csr", **param)
                 ocl = self.ai.medfilt1d_legacy(self.data, N, method="bbox_ocl_csr", **param)
@@ -285,7 +291,7 @@ def test_medfilt1d(self):
         logger.info("test_medfilt1d ng median Rwp_python = %.3f", rwp_pyt)
         self.assertLess(rwp_pyt, 0.1, "Rwp medfilt1d_ng Cython/Python: %.3f" % rwp_pyt)
 
-        if UtilsTest.opencl and pyopencl:
+        if valid_opencl:
             ocl = self.ai.medfilt1d_ng(self.data, N, method=("no", "csr", "opencl"), **param)
             rwp_ocl = mathutil.rwp(ref, ocl)
             logger.info("test_medfilt1d ng median Rwp_opencl = %.3f", rwp_ocl)
@@ -296,7 +302,7 @@ def test_medfilt1d(self):
         rwp_pyt = mathutil.rwp(ref, pyt)
         logger.info("test_medfilt1d ng trimmed-mean Rwp_python = %.3f", rwp_pyt)
         self.assertLess(rwp_pyt, 2, "Rwp trimmed-mean Cython/Python: %.3f" % rwp_pyt)
-        if UtilsTest.opencl and pyopencl:
+        if valid_opencl:
             ocl = self.ai.medfilt1d_ng(self.data, N, method=("no", "csr", 'opencl'), percentile=(20, 80), **param)
             rwp_ocl = mathutil.rwp(ref, ocl)
             logger.info("test_medfilt1d ng trimmed-mean Rwp_opencl = %.3f", rwp_ocl)
diff --git a/src/pyFAI/test/test_csr.py b/src/pyFAI/test/test_csr.py
index c19fc423e..6526ec9f1 100644
--- a/src/pyFAI/test/test_csr.py
+++ b/src/pyFAI/test/test_csr.py
@@ -64,6 +64,13 @@ def tearDownClass(cls):
 
     @unittest.skipIf((utilstest.UtilsTest.opencl is None) or (opencl.ocl is None), "Test on OpenCL disabled")
     def test_opencl_csr(self):
+        if UtilsTest.opencl and opencl.ocl:
+            valid_opencl = False if opencl.ocl.get_platform("Apple") else True
+        else:
+            valid_opencl = False
+        if not valid_opencl:
+            self.skipTest("Apple platform detected")
+
         testcases = [8 * 2 ** i for i in range(6)]  # [8, 16, 32, 64, 128, 256]
         for workgroup_size in testcases:
             with self.subTest(workgroup_size=workgroup_size):
diff --git a/src/pyFAI/test/test_detector.py b/src/pyFAI/test/test_detector.py
index 57ae8e871..505fc0419 100644
--- a/src/pyFAI/test/test_detector.py
+++ b/src/pyFAI/test/test_detector.py
@@ -33,7 +33,7 @@
 __contact__ = "picca@synchrotron-soleil.fr"
 __license__ = "MIT+"
 __copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
-__date__ = "06/10/2025"
+__date__ = "21/11/2025"
 
 import os
 import shutil
@@ -412,6 +412,9 @@ def test_sensor(self):
         filename = os.path.join(UtilsTest.tempdir, "test_sensor.h5")
         det1.save(filename)
         det4 = detector_factory(filename)
+        print(det2)
+        print(det4)
+        print(det2==det4)
         self.assertEqual(det2, det4, "after serialization to HDF5")
 
     def test_sensor2(self):
diff --git a/src/pyFAI/test/test_parallax.py b/src/pyFAI/test/test_parallax.py
index d13f226a0..577c98901 100644
--- a/src/pyFAI/test/test_parallax.py
+++ b/src/pyFAI/test/test_parallax.py
@@ -32,7 +32,7 @@
 __contact__ = "Jerome.Kieffer@ESRF.eu"
 __license__ = "MIT"
 __copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
-__date__ = "08/11/2025"
+__date__ = "21/11/2025"
 
 import unittest
 import numpy
@@ -127,7 +127,7 @@ def test_extension(self):
         self.assertEqual(indptr.size-1, numpy.prod(ai.detector.shape))
         self.assertEqual((indptr[1:] - indptr[:-1]).max(), 8)
         self.assertEqual(data.size, indices.size)
-        self.assertAlmostEqual(data.size/numpy.prod(ai.detector.shape), 3.56, delta=1e-3)
+        self.assertAlmostEqual(data.size/numpy.prod(ai.detector.shape), 3.56, delta=4e-3)
 
 
 def suite():