diff --git a/dart-if/include/dash/dart/if/dart_types.h b/dart-if/include/dash/dart/if/dart_types.h
index c391e198b..0887edae1 100644
--- a/dart-if/include/dash/dart/if/dart_types.h
+++ b/dart-if/include/dash/dart/if/dart_types.h
@@ -328,7 +328,13 @@ typedef enum
 dart_locality_scope_t;
 
 /** Maximum size of a host name string in \ref dart_hwinfo_t */
-#define DART_LOCALITY_HOST_MAX_SIZE        (HOST_NAME_MAX)
+#if defined(HOST_NAME_MAX)
+  #define DART_LOCALITY_HOST_MAX_SIZE      (HOST_NAME_MAX)
+#elif defined(_POSIX_HOST_NAME_MAX)
+  #define DART_LOCALITY_HOST_MAX_SIZE      (_POSIX_HOST_NAME_MAX)
+#else
+  #define DART_LOCALITY_HOST_MAX_SIZE     ((int)(256))
+#endif
 /** Maximum size of a domain tag string in \ref dart_hwinfo_t */
 #define DART_LOCALITY_DOMAIN_TAG_MAX_SIZE ((int)(32))
 /** Maximum number of domain scopes in \ref dart_hwinfo_t */
diff --git a/dart-impl/base/CMakeLists.txt b/dart-impl/base/CMakeLists.txt
index 36ca80de4..68e802034 100644
--- a/dart-impl/base/CMakeLists.txt
+++ b/dart-impl/base/CMakeLists.txt
@@ -81,7 +81,9 @@ if (NOT ENABLE_SHARED_WINDOWS)
        "${ADDITIONAL_COMPILE_FLAGS} -DDART_MPI_DISABLE_SHARED_WINDOWS")
 endif()
 
-set (ADDITIONAL_LIBRARIES ${ADDITIONAL_LIBRARIES} rt)
+if(NOT APPLE)
+  set (ADDITIONAL_LIBRARIES ${ADDITIONAL_LIBRARIES} rt)
+endif()
 
 
 set(DASH_DART_BASE_INCLUDE_DIRS
diff --git a/dart-impl/base/src/hwinfo.c b/dart-impl/base/src/hwinfo.c
index f7a6b15aa..73f543d1e 100644
--- a/dart-impl/base/src/hwinfo.c
+++ b/dart-impl/base/src/hwinfo.c
@@ -4,6 +4,29 @@
 #  define _GNU_SOURCE
 #  include <sched.h>
 #endif
+
+#ifdef DART__PLATFORM__OSX
+#include <cpuid.h>
+#include <stdint.h>
+
+#define CPUID(INFO, LEAF, SUBLEAF) __cpuid_count(LEAF, SUBLEAF, INFO[0], INFO[1], INFO[2], INFO[3])
+
+static int osx_sched_getcpu() {                              
+  uint32_t CPUInfo[4]; 
+  int cpuid;                          
+  CPUID(CPUInfo, 1, 0);                          
+  /* CPUInfo[1] is EBX, bits 24-31 are APIC ID */ 
+  if ( (CPUInfo[3] & (1 << 9)) == 0) {           
+    cpuid = -1;  /* no APIC on chip */             
+  }                                              
+  else {                                         
+    cpuid = (unsigned)CPUInfo[1] >> 24;                    
+  }                                              
+  if (cpuid < 0) cpuid = 0;
+  return cpuid;                          
+}
+#endif
+
 #include <dash/dart/base/macro.h>
 #include <dash/dart/base/logging.h>
 #include <dash/dart/base/locality.h>
@@ -353,15 +376,17 @@ dart_ret_t dart_hwinfo(
   }
 #endif /* DART_ENABLE_PAPI */
 
-#ifdef DART__PLATFORM__LINUX
-  if (hw.cpu_id < 0) {
+if (hw.cpu_id < 0) {
+  #ifdef DART__PLATFORM__LINUX
     hw.cpu_id = sched_getcpu();
-  }
-#else
-  DART_LOG_ERROR("dart_hwinfo: "
-                 "HWLOC or PAPI required if not running on a Linux platform");
-  return DART_ERR_OTHER;
-#endif
+  #elif defined(DART__PLATFORM__OSX)
+    hw.cpu_id = osx_sched_getcpu();
+  #else
+    DART_LOG_ERROR("dart_hwinfo: "
+                "HWLOC or PAPI required if not running on a Linux or OSX platform");
+    return DART_ERR_OTHER;
+  #endif
+}
 
 #ifdef DART__ARCH__IS_MIC
   /*
diff --git a/dart-impl/mpi/CMakeLists.txt b/dart-impl/mpi/CMakeLists.txt
index 767807d21..5977b1428 100644
--- a/dart-impl/mpi/CMakeLists.txt
+++ b/dart-impl/mpi/CMakeLists.txt
@@ -153,7 +153,9 @@ if(MPI_COMPILE_FLAGS)
        ${ADDITIONAL_COMPILE_FLAGS} ${MPI_COMPILE_FLAGS})
 endif()
 
-set (ADDITIONAL_LIBRARIES ${ADDITIONAL_LIBRARIES} rt)
+if(NOT APPLE)
+  set (ADDITIONAL_LIBRARIES ${ADDITIONAL_LIBRARIES} rt)
+endif()
 
 message (STATUS "DART additional compile flags:")
 set(ADDITIONAL_COMPILE_FLAGS_STR "")
diff --git a/dart-impl/mpi/src/dart_synchronization.c b/dart-impl/mpi/src/dart_synchronization.c
index 5da5a9139..4d5a62d4f 100644
--- a/dart-impl/mpi/src/dart_synchronization.c
+++ b/dart-impl/mpi/src/dart_synchronization.c
@@ -23,8 +23,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <malloc.h>
-
 
 struct dart_lock_struct
 {
diff --git a/dash/CMakeLists.txt b/dash/CMakeLists.txt
index e86df9908..248dd2f42 100644
--- a/dash/CMakeLists.txt
+++ b/dash/CMakeLists.txt
@@ -102,7 +102,7 @@ if (PAPI_FOUND AND ENABLE_PAPI)
        ${PAPI_INCLUDE_DIRS})
   set (ADDITIONAL_LIBRARIES ${ADDITIONAL_LIBRARIES}
        ${PAPI_LIBRARIES})
-else()
+elseif(NOT APPLE)
   set (ADDITIONAL_LIBRARIES ${ADDITIONAL_LIBRARIES}
        rt)
 endif()
diff --git a/dash/examples/bench.07.local-copy/main.cpp b/dash/examples/bench.07.local-copy/main.cpp
index d4e083d5b..069292246 100644
--- a/dash/examples/bench.07.local-copy/main.cpp
+++ b/dash/examples/bench.07.local-copy/main.cpp
@@ -11,8 +11,6 @@
 #include <cstring>
 #include <limits>
 
-#include <malloc.h>
-
 #ifdef DASH_ENABLE_IPM
 #include <mpi.h>
 #endif
@@ -22,6 +20,12 @@ using std::endl;
 using std::setw;
 using std::setprecision;
 
+static void *_aligned_malloc(size_t size, size_t alignment) {
+    void *buffer;
+    posix_memalign(&buffer, alignment, size);
+    return buffer;
+}
+
 typedef double  ElementType;
 typedef int64_t index_t;
 typedef dash::Array<
@@ -319,7 +323,7 @@ measurement copy_block_to_local(
   ElementType * local_array = nullptr;
   if (myid == target_unit_id) {
     local_array = static_cast<ElementType *>(
-                    memalign(align_size, block_bytes));
+                    _aligned_malloc(block_bytes, align_size));
   }
 
   Array_t global_array;
diff --git a/dash/include/dash/internal/Config.h b/dash/include/dash/internal/Config.h
index 90e5d0d39..c795fd259 100644
--- a/dash/include/dash/internal/Config.h
+++ b/dash/include/dash/internal/Config.h
@@ -157,6 +157,7 @@
 // OSX
 #if defined(__MACH__) && defined(__APPLE__)
 #  define DASH__PLATFORM__OSX
+#  define DASH__PLATFORM__POSIX
 #endif
 // UX
 #if (defined(__hpux) || defined(hpux)) || \