diff --git a/math/dbcsr/Portfile b/math/dbcsr/Portfile
index 72bdbd27d21bf..ac1dfc3790285 100644
--- a/math/dbcsr/Portfile
+++ b/math/dbcsr/Portfile
@@ -3,6 +3,7 @@
 PortSystem          1.0
 PortGroup           cmake 1.1
 PortGroup           github 1.0
+PortGroup           linear_algebra 1.0
 PortGroup           mpi 1.0
 
 github.setup        cp2k dbcsr 2.5.0 v
@@ -26,7 +27,6 @@ set py_ver_nodot    [string map {. {}} ${py_ver}]
 depends_build-append \
                     port:py${py_ver_nodot}-fypp \
                     port:python${py_ver_nodot}
-depends_lib-append  path:lib/libopenblas.dylib:OpenBLAS
 
 if {${os.platform} eq "darwin" && ${os.arch} eq "powerpc"} {
     mpi.setup       require require_fortran \
@@ -37,17 +37,42 @@ if {${os.platform} eq "darwin" && ${os.arch} eq "powerpc"} {
                     -gcc44 -gcc45 -gcc46 -gcc47 -gcc48 -gcc49 -gcc5 -gcc6
 }
 
-compiler.cxx_standard 2014
+compiler.cxx_standard   2014
+compiler.openmp_version 4.5
+
+# OpenBLAS is not properly supported for Apple yet:
+# https://github.com/cp2k/dbcsr/issues/645
+# It is confirmed to be broken on PPC.
+if {[variant_isset accelerate]} {
+    patchfiles-append \
+                    patch-accelerate.diff
+}
+
+# For now, disabling because of this:
+# https://github.com/cp2k/dbcsr/issues/645#issuecomment-1382381278
+# pre-configure {
+#     configure.args-append \
+#                     -DMPI_RUN_COMMAND=${prefix}/bin/${mpi.exec} \
+#                     -DMPIEXEC_EXECUTABLE=${prefix}/bin/${mpi.exec} \
+# }
 
 configure.args-append \
                     -DPython_EXECUTABLE=${prefix}/bin/python${py_ver} \
                     -DFYPP_EXECUTABLE=${prefix}/bin/fypp-${py_ver} \
                     -DUSE_MPI=ON \
-                    -DUSE_OPENMP=OFF \
+                    -DUSE_OPENMP=ON \
+                    -DUSE_SMM=blas \
                     -DWITH_C_API=ON \
                     -DWITH_CUDA_PROFILING=OFF \
                     -DBUILD_TESTING=ON \
+                    -DTEST_OMP_THREADS=2 \
+                    -DTEST_MPI_RANKS=4 \
                     -DWITH_EXAMPLES=OFF
 
+pre-test {
+    # test infrastructure uses /bin/ps, which is forbidden by sandboxing
+    append portsandbox_profile " (allow process-exec (literal \"/bin/ps\") (with no-profile))"
+}
+
 test.run            yes
 test.cmd            ctest
diff --git a/math/dbcsr/files/patch-accelerate.diff b/math/dbcsr/files/patch-accelerate.diff
new file mode 100644
index 0000000000000..9d54bd451a66b
--- /dev/null
+++ b/math/dbcsr/files/patch-accelerate.diff
@@ -0,0 +1,16 @@
+# It does not get picked correctly when conditional.
+
+--- src/CMakeLists.txt.orig	2022-12-28 04:24:55.000000000 +0700
++++ src/CMakeLists.txt	2023-01-14 18:54:26.000000000 +0700
+@@ -175,10 +175,7 @@
+ if (APPLE)
+   # fix /proc/self/statm can not be opened on macOS
+   target_compile_definitions(dbcsr PRIVATE __NO_STATM_ACCESS)
+-
+-  if (BLAS_LIBRARIES MATCHES "Accelerate")
+-    target_compile_definitions(dbcsr PRIVATE __ACCELERATE)
+-  endif ()
++  target_compile_definitions(dbcsr PRIVATE __ACCELERATE)
+ endif ()
+ 
+ # set -DNDEBUG for Release builds