diff --git a/core/pen/include/file_system.h b/core/pen/include/file_system.h
index a2c2b353..6cb95157 100644
--- a/core/pen/include/file_system.h
+++ b/core/pen/include/file_system.h
@@ -29,6 +29,7 @@ namespace pen
     bool       filesystem_file_exists(const c8* filename);
     pen_error  filesystem_read_file_to_buffer(const c8* filename, void** p_buffer, u32& buffer_size);
     pen_error  filesystem_getmtime(const c8* filename, u32& mtime_out);
+    size_t     filesystem_getsize(const c8* filename);
     void       filesystem_toggle_hidden_files();
     pen_error  filesystem_enum_volumes(fs_tree_node& results);
     pen_error  filesystem_enum_directory(const c8* directory, fs_tree_node& results, s32 num_wildcards = 0, ...);
diff --git a/core/pen/source/osx/os.mm b/core/pen/source/osx/os.mm
index 5150ae56..882dd175 100644
--- a/core/pen/source/osx/os.mm
+++ b/core/pen/source/osx/os.mm
@@ -853,6 +853,11 @@ void os_ignore_slient()
     {
         // stub
     }
+
+    f32 os_get_status_bar_portrait_height()
+    {
+        return 0.0f;
+    }
 }
 
 //
diff --git a/core/pen/source/posix/file_system.cpp b/core/pen/source/posix/file_system.cpp
index e6367986..8ee04436 100644
--- a/core/pen/source/posix/file_system.cpp
+++ b/core/pen/source/posix/file_system.cpp
@@ -222,7 +222,6 @@ namespace pen
 
         if (num_items == 0)
         {
-
             return PEN_ERR_FILE_NOT_FOUND;
         }
 
@@ -300,6 +299,14 @@ namespace pen
         return PEN_ERR_OK;
     }
 
+    size_t filesystem_getsize(const c8* filename)
+    {
+        struct stat stat_res;
+        memset(&stat_res, 0x0, sizeof(stat_res));
+        stat(filename, &stat_res);
+        return stat_res.st_size;
+    }
+
     const c8* filesystem_get_user_directory()
     {
         static c8 default_dir[1024];
diff --git a/core/put/source/dev_ui.cpp b/core/put/source/dev_ui.cpp
index d66ed097..797fac6e 100644
--- a/core/put/source/dev_ui.cpp
+++ b/core/put/source/dev_ui.cpp
@@ -21,12 +21,6 @@
 
 #include <fstream>
 
-#if PEN_PLATFORM_IOS
-#define DEV_UI_SCALE 3
-#else
-#define DEV_UI_SCALE 1
-#endif
-
 using namespace pen;
 using namespace put;
 
@@ -63,17 +57,17 @@ namespace
     bool           s_initialised = false;
     bool           s_enable_main_menu_bar = true;
 
-    void create_texture_atlas()
+    void create_texture_atlas(float pixel_size)
     {
         ImGuiIO&  io = ImGui::GetIO();
         const Str cousine_reg = pen::os_path_for_resource("data/fonts/cousine-regular.ttf");
-        io.Fonts->AddFontFromFileTTF(cousine_reg.c_str(), 14 * DEV_UI_SCALE);
+        io.Fonts->AddFontFromFileTTF(cousine_reg.c_str(), pixel_size);
 
         ImFontConfig config;
         config.MergeMode = true;
         static const ImWchar icon_ranges[] = {ICON_MIN_FA, ICON_MAX_FA, 0};
         const Str            font_awesome = pen::os_path_for_resource("data/fonts/fontawesome-webfont.ttf");
-        io.Fonts->AddFontFromFileTTF(font_awesome.c_str(), 14 * DEV_UI_SCALE, &config, icon_ranges);
+        io.Fonts->AddFontFromFileTTF(font_awesome.c_str(), pixel_size, &config, icon_ranges);
 
         // Build texture atlas
         unsigned char* pixels;
@@ -313,7 +307,7 @@ namespace put
             }
         }
         
-        bool init(ImGuiStyle& style)
+        bool init(ImGuiStyle& style, float font_pixel_size)
         {
             create_context();
 
@@ -346,7 +340,7 @@ namespace put
             s_imgui_rs.imgui_shader = pmfx::load_shader("imgui");
             s_imgui_rs.imgui_ex_shader = pmfx::load_shader("imgui_ex");
 
-            create_texture_atlas();
+            create_texture_atlas(font_pixel_size);
 
             create_render_states();
 
diff --git a/core/put/source/dev_ui.h b/core/put/source/dev_ui.h
index b91ae14e..a40b72bb 100644
--- a/core/put/source/dev_ui.h
+++ b/core/put/source/dev_ui.h
@@ -14,6 +14,13 @@
 
 #define IMG(I) (void*)(intptr_t) I
 
+#if PEN_PLATFORM_IOS
+#define DEV_UI_SCALE 3
+#else
+#define DEV_UI_SCALE 1
+#endif
+
+
 namespace put
 {
     namespace dev_ui
@@ -67,7 +74,7 @@ namespace put
         
         void        create_context();
         ImGuiStyle& default_pmtech_style();
-        bool        init(ImGuiStyle& style = default_pmtech_style());
+        bool        init(ImGuiStyle& style = default_pmtech_style(), f32 font_pixel_size = 14.0f * DEV_UI_SCALE);
         void        shutdown();
         void        render();
         void        update();