diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0fac1461..c19eceae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,6 +26,7 @@ option(MI_DEBUG_UBSAN       "Build with undefined-behavior sanitizer (needs clan
 option(MI_CHECK_FULL        "Use full internal invariant checking in DEBUG mode (deprecated, use MI_DEBUG_FULL instead)" OFF)
 option(MI_INSTALL_TOPLEVEL  "Install directly into $CMAKE_INSTALL_PREFIX instead of PREFIX/lib/mimalloc-version (deprecated)" OFF)
 option(MI_USE_LIBATOMIC     "Explicitly link with -latomic (on older systems) (deprecated and detected automatically)" OFF)
+option(MI_SKIP_COLLECT_ON_EXIT, "Skip collecting memory on exit" OFF)
 
 include(GNUInstallDirs)
 include("cmake/mimalloc-config-version.cmake")
@@ -117,6 +118,10 @@ if(MI_CHECK_FULL)
   set(MI_DEBUG_FULL "ON")
 endif()
 
+if (MI_SKIP_COLLECT_ON_EXIT)
+  list(APPEND mi_defines MI_SKIP_COLLECT_ON_EXIT=1)
+endif()
+
 if(MI_DEBUG_FULL)
   message(STATUS "Set debug level to full internal invariant checking (MI_DEBUG_FULL=ON)")
   list(APPEND mi_defines MI_DEBUG=3)   # full invariant checking
@@ -310,6 +315,7 @@ if(MI_BUILD_SHARED)
     add_custom_command(TARGET mimalloc POST_BUILD
       COMMAND "${CMAKE_COMMAND}" -E copy "${CMAKE_CURRENT_SOURCE_DIR}/bin/mimalloc-redirect${MIMALLOC_REDIRECT_SUFFIX}.dll" $<TARGET_FILE_DIR:mimalloc>
       COMMENT "Copy mimalloc-redirect${MIMALLOC_REDIRECT_SUFFIX}.dll to output directory")
+    install(FILES "$<TARGET_FILE_DIR:mimalloc>/mimalloc-redirect${MIMALLOC_REDIRECT_SUFFIX}.dll" DESTINATION ${mi_install_libdir})
   endif()
 
   install(TARGETS mimalloc EXPORT mimalloc DESTINATION ${mi_install_libdir} LIBRARY)  
diff --git a/include/mimalloc-internal.h b/include/mimalloc-internal.h
index 8e8b5c9c..1d0dc539 100644
--- a/include/mimalloc-internal.h
+++ b/include/mimalloc-internal.h
@@ -812,6 +812,7 @@ static inline mi_threadid_t _mi_thread_id(void) mi_attr_noexcept {
         || (defined(__APPLE__)   && (defined(__x86_64__) || defined(__aarch64__))) \
         || (defined(__BIONIC__)  && (defined(__x86_64__) || defined(__i386__) || defined(__arm__) || defined(__aarch64__))) \
         || (defined(__FreeBSD__) && (defined(__x86_64__) || defined(__i386__) || defined(__aarch64__))) \
+        || (defined(__OpenBSD__) && (defined(__x86_64__) || defined(__i386__) || defined(__aarch64__))) \
       )
 
 static inline void* mi_tls_slot(size_t slot) mi_attr_noexcept {
diff --git a/src/alloc-override-osx.c b/src/alloc-override-osx.c
index 34cde0b4..a88186bc 100644
--- a/src/alloc-override-osx.c
+++ b/src/alloc-override-osx.c
@@ -217,7 +217,7 @@ static malloc_zone_t mi_malloc_zone = {
   .batch_free = &zone_batch_free,
   .introspect = &mi_introspect,  
 #if defined(MAC_OS_X_VERSION_10_6) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6)
-  #if defined(MAC_OS_X_VERSION_10_7) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7)
+  #if defined(MAC_OS_X_VERSION_10_14) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14)
   .version = 10,
   #else
   .version = 9,
@@ -226,7 +226,7 @@ static malloc_zone_t mi_malloc_zone = {
   .memalign = &zone_memalign,
   .free_definite_size = &zone_free_definite_size,
   .pressure_relief = &zone_pressure_relief,
-  #if defined(MAC_OS_X_VERSION_10_7) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7)
+  #if defined(MAC_OS_X_VERSION_10_14) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_14)
   .claimed_address = &zone_claimed_address,
   #endif
 #else
diff --git a/src/init.c b/src/init.c
index d428d8c9..4ab46522 100644
--- a/src/init.c
+++ b/src/init.c
@@ -562,11 +562,13 @@ static void mi_process_done(void) {
   FlsFree(mi_fls_key);  // call thread-done on all threads (except the main thread) to prevent dangling callback pointer if statically linked with a DLL; Issue #208
   #endif
   
-  #if (MI_DEBUG != 0) || !defined(MI_SHARED_LIB)  
-  // free all memory if possible on process exit. This is not needed for a stand-alone process
-  // but should be done if mimalloc is statically linked into another shared library which
-  // is repeatedly loaded/unloaded, see issue #281.
-  mi_collect(true /* force */ );
+  #ifndef MI_SKIP_COLLECT_ON_EXIT
+    #if (MI_DEBUG != 0) || !defined(MI_SHARED_LIB)  
+    // free all memory if possible on process exit. This is not needed for a stand-alone process
+    // but should be done if mimalloc is statically linked into another shared library which
+    // is repeatedly loaded/unloaded, see issue #281.
+    mi_collect(true /* force */ );
+    #endif
   #endif
 
   if (mi_option_is_enabled(mi_option_show_stats) || mi_option_is_enabled(mi_option_verbose)) {