diff --git a/.gitignore b/.gitignore
index 86fcb79..27e78ae 100644
--- a/.gitignore
+++ b/.gitignore
@@ -76,3 +76,5 @@ fabric.properties
 # Android studio 3.1+ serialized cache file
 .idea/caches/build_file_checksums.ser
 build/
+
+.DS_Store
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e16eca..2288949 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -58,8 +58,11 @@ elseif(UNIX AND NOT APPLE)
 elseif(APPLE)
     target_sources(libblisp_obj PRIVATE
             ${CMAKE_SOURCE_DIR}/vendor/libserialport/macosx.c)
-    target_link_libraries(libblisp_obj PRIVATE "-framework IOKit" "-framework CoreFoundation")
-    target_compile_definitions(libblisp_obj PRIVATE LIBSERIALPORT_ATBUILD "SP_API=__attribute__((visibility(\"default\")))")
+    target_link_libraries(libblisp PRIVATE "-framework IOKit" "-framework CoreFoundation")
+    target_compile_definitions(libblisp_obj PRIVATE
+            LIBSERIALPORT_ATBUILD
+            "SP_PRIV=__attribute__((visibility(\"hidden\")))"
+            "SP_API=__attribute__((visibility(\"default\")))")
     target_include_directories(libblisp_obj PRIVATE ${CMAKE_SOURCE_DIR}/vendor/libserialport)
     write_file(${CMAKE_SOURCE_DIR}/vendor/libserialport/config.h "// bypass errors.")
 endif()
diff --git a/lib/blisp.c b/lib/blisp.c
index e44443f..5503841 100644
--- a/lib/blisp.c
+++ b/lib/blisp.c
@@ -2,7 +2,7 @@
 #include <blisp.h>
 #include <blisp_util.h>
 #include <libserialport.h>
-#include <malloc.h>
+#include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 
diff --git a/tools/blisp/CMakeLists.txt b/tools/blisp/CMakeLists.txt
index 9b97ae4..6cb53f4 100644
--- a/tools/blisp/CMakeLists.txt
+++ b/tools/blisp/CMakeLists.txt
@@ -12,4 +12,6 @@ target_link_libraries(blisp PRIVATE
 
 if(WIN32)
     target_link_libraries(blisp PRIVATE Setupapi.lib)
+elseif(APPLE)
+    target_link_libraries(blisp PRIVATE "-framework IOKit" "-framework CoreFoundation")
 endif()
\ No newline at end of file
diff --git a/tools/blisp/src/cmd/write.c b/tools/blisp/src/cmd/write.c
index b90a58e..658330a 100644
--- a/tools/blisp/src/cmd/write.c
+++ b/tools/blisp/src/cmd/write.c
@@ -5,6 +5,8 @@
 #include <string.h>
 #include <inttypes.h>
 #include "blisp_struct.h"
+#include <assert.h>
+#include <stdlib.h>
 
 #ifdef __linux__
 #include <unistd.h>
@@ -14,6 +16,8 @@
 typedef SSIZE_T ssize_t;
 #include <windows.h>
 #define PATH_MAX MAX_PATH
+#elif defined(__APPLE__)
+#include <sys/syslimits.h>
 #endif
 
 #define REG_EXTENDED 1
@@ -30,9 +34,6 @@ static void* cmd_write_argtable[6];
 // Ugh. This stuff is just so messy without C++17 or Qt...
 // These are not thread safe, but it doesn't place the responsibility
 // to free an allocated buffer on the caller.nn
-#include <string.h>
-#include <assert.h>
-#include <stdlib.h>
 
 static void get_executable_path(char* buffer_out, uint32_t max_size) {
     assert (max_size >= PATH_MAX); // n.b. 1024 on MacOS. 4K on most Linux.