diff --git a/.ci_support/linux_64_blas_implgenericchannel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml b/.ci_support/linux_64_blas_implgenericchannel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml
index df86cfd65..ba5e25c61 100644
--- a/.ci_support/linux_64_blas_implgenericchannel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml
+++ b/.ci_support/linux_64_blas_implgenericchannel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml
@@ -17,7 +17,7 @@ cuda_compiler:
 cuda_compiler_version:
 - '12.9'
 cudnn:
-- '9.10'
+- '9'
 cxx_compiler:
 - gxx
 cxx_compiler_version:
@@ -76,7 +76,6 @@ zip_keys:
   - cxx_compiler_version
   - c_stdlib_version
   - cuda_compiler_version
-  - cudnn
 - - channel_targets
   - is_rc
 zlib:
diff --git a/.ci_support/linux_64_blas_implgenericchannel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml b/.ci_support/linux_64_blas_implgenericchannel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
index 1518e21be..ae65b5e2c 100644
--- a/.ci_support/linux_64_blas_implgenericchannel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
+++ b/.ci_support/linux_64_blas_implgenericchannel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
@@ -76,7 +76,6 @@ zip_keys:
   - cxx_compiler_version
   - c_stdlib_version
   - cuda_compiler_version
-  - cudnn
 - - channel_targets
   - is_rc
 zlib:
diff --git a/.ci_support/linux_64_blas_implmklchannel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml b/.ci_support/linux_64_blas_implmklchannel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml
index 38c27f7d9..ec9909281 100644
--- a/.ci_support/linux_64_blas_implmklchannel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml
+++ b/.ci_support/linux_64_blas_implmklchannel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml
@@ -17,7 +17,7 @@ cuda_compiler:
 cuda_compiler_version:
 - '12.9'
 cudnn:
-- '9.10'
+- '9'
 cxx_compiler:
 - gxx
 cxx_compiler_version:
@@ -76,7 +76,6 @@ zip_keys:
   - cxx_compiler_version
   - c_stdlib_version
   - cuda_compiler_version
-  - cudnn
 - - channel_targets
   - is_rc
 zlib:
diff --git a/.ci_support/linux_64_blas_implmklchannel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml b/.ci_support/linux_64_blas_implmklchannel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
index 22425b7bd..8678ee6e0 100644
--- a/.ci_support/linux_64_blas_implmklchannel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
+++ b/.ci_support/linux_64_blas_implmklchannel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
@@ -76,7 +76,6 @@ zip_keys:
   - cxx_compiler_version
   - c_stdlib_version
   - cuda_compiler_version
-  - cudnn
 - - channel_targets
   - is_rc
 zlib:
diff --git a/.ci_support/linux_aarch64_channel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml b/.ci_support/linux_aarch64_channel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml
index 2f89bcc36..3f1420dc5 100644
--- a/.ci_support/linux_aarch64_channel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml
+++ b/.ci_support/linux_aarch64_channel_targetsconda-forge_maincuda_compiler_version12.9is_rcFalse.yaml
@@ -17,7 +17,7 @@ cuda_compiler:
 cuda_compiler_version:
 - '12.9'
 cudnn:
-- '9.10'
+- '9'
 cxx_compiler:
 - gxx
 cxx_compiler_version:
@@ -74,7 +74,6 @@ zip_keys:
   - cxx_compiler_version
   - c_stdlib_version
   - cuda_compiler_version
-  - cudnn
 - - channel_targets
   - is_rc
 zlib:
diff --git a/.ci_support/linux_aarch64_channel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml b/.ci_support/linux_aarch64_channel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
index 6798e33df..de49b27a3 100644
--- a/.ci_support/linux_aarch64_channel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
+++ b/.ci_support/linux_aarch64_channel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
@@ -74,7 +74,6 @@ zip_keys:
   - cxx_compiler_version
   - c_stdlib_version
   - cuda_compiler_version
-  - cudnn
 - - channel_targets
   - is_rc
 zlib:
diff --git a/.ci_support/migrations/cudnn910.yaml b/.ci_support/migrations/cudnn910.yaml
deleted file mode 100644
index 0a657ef15..000000000
--- a/.ci_support/migrations/cudnn910.yaml
+++ /dev/null
@@ -1,34 +0,0 @@
-# needs to be ordered before CUDA 13.0 migrator
-migrator_ts: 1755016000
-__migrator:
-  kind:
-    version
-  migration_number:
-    1
-  build_number:
-    1
-  ordering:
-    cudnn:
-      - None
-      - 9
-      - 9.10
-  commit_message: |
-    Rebuild for cudnn 9.10
-    
-    Conda-forge assumed cudnn 9.x builds would stay compatible with each other.
-    This is the case for the API/ABI of the library, but nvidia dropped support
-    for older GPU architectures in cudnn 9.11. Since we have no package-level
-    metadata about compatibility with specific GPU architectures, this effectively
-    breaks all packages built atop cudnn for users on affected older GPUs.
-    
-    In order to remedy this situation, we need to rebuild all cudnn-dependent
-    feedstocks against cudnn 9.10 (the last version with full architecture support),
-    before we mark all those newer cudnn builds as broken. This only affects artefacts
-    for CUDA 12.x; those for CUDA 13.x are not affected, since CUDA 13 never supported
-    those older architectures in the first place.
-    
-    For more details see: https://github.com/conda-forge/cudnn-feedstock/issues/124
-
-cudnn:
-  - None
-  - 9.10                       # [((linux and not ppc64le) or win64) and os.environ.get("CF_CUDA_ENABLED", "False") == "True"]
diff --git a/.ci_support/migrations/fmt121_spdlog117.yaml b/.ci_support/migrations/fmt121_spdlog117.yaml
new file mode 100644
index 000000000..f46fced4a
--- /dev/null
+++ b/.ci_support/migrations/fmt121_spdlog117.yaml
@@ -0,0 +1,10 @@
+__migrator:
+  build_number: 1
+  commit_message: Rebuild for fmt 12.1 and spdlog 1.17
+  kind: version
+  migration_number: 1
+migrator_ts: 1767674179.1402016
+fmt:
+- '12.1'
+spdlog:
+- '1.17'
diff --git a/.ci_support/win_64_channel_targetsconda-forge_maincuda_compiler_version12.8is_rcFalse.yaml b/.ci_support/win_64_channel_targetsconda-forge_maincuda_compiler_version12.8is_rcFalse.yaml
index 6742b21df..5b359f330 100644
--- a/.ci_support/win_64_channel_targetsconda-forge_maincuda_compiler_version12.8is_rcFalse.yaml
+++ b/.ci_support/win_64_channel_targetsconda-forge_maincuda_compiler_version12.8is_rcFalse.yaml
@@ -13,7 +13,7 @@ cuda_compiler:
 cuda_compiler_version:
 - '12.8'
 cudnn:
-- '9.10'
+- '9'
 cxx_compiler:
 - vs2022
 github_actions_labels:
@@ -58,7 +58,5 @@ target_platform:
 zip_keys:
 - - channel_targets
   - is_rc
-- - cuda_compiler_version
-  - cudnn
 zlib:
 - '1'
diff --git a/.ci_support/win_64_channel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml b/.ci_support/win_64_channel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
index 5a4749d18..66374482d 100644
--- a/.ci_support/win_64_channel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
+++ b/.ci_support/win_64_channel_targetsconda-forge_maincuda_compiler_versionNoneis_rcFalse.yaml
@@ -58,7 +58,5 @@ target_platform:
 zip_keys:
 - - channel_targets
   - is_rc
-- - cuda_compiler_version
-  - cudnn
 zlib:
 - '1'
diff --git a/.github/workflows/conda-build.yml b/.github/workflows/conda-build.yml
index 6e7bede8a..0a61c8069 100644
--- a/.github/workflows/conda-build.yml
+++ b/.github/workflows/conda-build.yml
@@ -259,4 +259,4 @@ jobs:
         name: ${{ steps.prepare-artifacts.outputs.ENV_ARTIFACT_NAME }}
         path: ${{ steps.prepare-artifacts.outputs.ENV_ARTIFACT_PATH }}
         retention-days: 14
-      continue-on-error: true
+      continue-on-error: true
\ No newline at end of file
diff --git a/.scripts/run_osx_build.sh b/.scripts/run_osx_build.sh
index 361edeb2c..bac7141a9 100755
--- a/.scripts/run_osx_build.sh
+++ b/.scripts/run_osx_build.sh
@@ -63,6 +63,25 @@ if [[ "${sha:-}" == "" ]]; then
   sha=$(git rev-parse HEAD)
 fi
 
+if [[ "${OSX_SDK_DIR:-}" == "" ]]; then
+  if [[ "${CI:-}" == "" ]]; then
+    echo "Please set OSX_SDK_DIR to a directory where SDKs can be downloaded to. Aborting"
+    exit 1
+  else
+    export OSX_SDK_DIR=/opt/conda-sdks
+    /usr/bin/sudo mkdir -p "${OSX_SDK_DIR}"
+    /usr/bin/sudo chown "${USER}" "${OSX_SDK_DIR}"
+  fi
+else
+  if tmpf=$(mktemp -p "$OSX_SDK_DIR" tmp.XXXXXXXX 2>/dev/null); then
+      rm -f "$tmpf"
+      echo "OSX_SDK_DIR is writeable without sudo, continuing"
+  else
+      echo "User-provided OSX_SDK_DIR is not writeable for current user! Aborting"
+      exit 1
+  fi
+fi
+
 echo -e "\n\nRunning the build setup script."
 source run_conda_forge_build_setup
 
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 8bd21290b..8fd4414ab 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -1,6 +1,6 @@
 # if you wish to build release candidate number X, append the version string with ".rcX"
 {% set version = "2.8.0" %}
-{% set build = 2 %}
+{% set build = 3 %}
 
 # Use a higher build number for the CUDA variant, to ensure that it's
 # preferred by conda's solver, and it's preferentially