diff --git a/CMakeLists.txt b/CMakeLists.txt
index 354412a..3c2e6bc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -61,7 +61,7 @@ include_directories(${INCLUDE_DIRS})
 
 # set some platform-specific flags
 if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
-	#set(MACOSX_DEPLOYMENT_TARGET 10.9)
+	#set(MACOSX_DEPLOYMENT_TARGET 10.4)
 	#set(CMAKE_CXX_FLAGS "--sysroot ${CMAKE_OSX_SYSROOT} ${CMAKE_CXX_FLAGS} -stdlib=libc++")
 	add_definitions(-D__WXMAC__)
 else()
diff --git a/src/TyroApp.cpp b/src/TyroApp.cpp
index bc7164e..64d77eb 100644
--- a/src/TyroApp.cpp
+++ b/src/TyroApp.cpp
@@ -19,8 +19,6 @@ MainFrame *Glob_main_frame = nullptr;
 TyroMenu *Glob_menu_bar = nullptr;
 wxStatusBar *Glob_status_bar = nullptr;
 
-StringConstMap Glob_lexer_map;
-
 /**
  * Class with main method
  */
@@ -39,7 +37,6 @@ public:
 		this->SetVendorName(APP_VENDOR);
 
 		// Initialize globals
-		TyroApp::InitLexerMap();
 		Glob_config = wxConfigBase::Get();
 		Glob_lang_config = new LangConfig();
 		Glob_theme_config = new ThemeConfig();
@@ -116,43 +113,6 @@ private:
 	// app loading variables
 	wxArrayString files;
 	size_t param_count = 0;
-
-	/**
-	 * Set up mapping for lexers
-	 */
-	void const static InitLexerMap()
-	{
-		Glob_lexer_map[""] = wxSTC_LEX_NULL;
-		Glob_lexer_map["batch"] = wxSTC_LEX_BATCH;
-		Glob_lexer_map["caml"] = wxSTC_LEX_CAML;
-		Glob_lexer_map["cmake"] = wxSTC_LEX_CMAKE;
-		Glob_lexer_map["cpp"] = wxSTC_LEX_CPP;
-		Glob_lexer_map["css"] = wxSTC_LEX_CSS;
-		Glob_lexer_map["fortran"] = wxSTC_LEX_FORTRAN;
-		Glob_lexer_map["haskell"] = wxSTC_LEX_HASKELL;
-		Glob_lexer_map["java"] = wxSTC_LEX_CPP;
-		Glob_lexer_map["js"] = wxSTC_LEX_CPP;
-		Glob_lexer_map["lisp"] = wxSTC_LEX_LISP;
-		Glob_lexer_map["lua"] = wxSTC_LEX_LUA;
-		Glob_lexer_map["makefile"] = wxSTC_LEX_MAKEFILE;
-		Glob_lexer_map["markdown"] = wxSTC_LEX_MARKDOWN;
-		Glob_lexer_map["php"] = wxSTC_LEX_HTML;
-		Glob_lexer_map["perl"] = wxSTC_LEX_PERL;
-		Glob_lexer_map["properties"] = wxSTC_LEX_PROPERTIES;
-		Glob_lexer_map["python"] = wxSTC_LEX_PYTHON;
-		Glob_lexer_map["ruby"] = wxSTC_LEX_RUBY;
-	#ifdef wxSTC_LEX_RUST
-		Glob_lexer_map["rust"] = wxSTC_LEX_RUST;
-	#endif
-	#ifndef wxSTC_LEX_RUST
-		Glob_lexer_map["rust"] = wxSTC_LEX_CPP;
-	#endif
-		Glob_lexer_map["scheme"] = wxSTC_LEX_LISP;
-		Glob_lexer_map["shell"] = wxSTC_LEX_BASH;
-		Glob_lexer_map["sql"] = wxSTC_LEX_SQL;
-		Glob_lexer_map["xml"] = wxSTC_LEX_XML;
-		Glob_lexer_map["yaml"] = wxSTC_LEX_YAML;
-	}
 	
 	/**
 	 * Toolkit-specific settings 
diff --git a/src/definitions.h b/src/definitions.h
index 95230e4..cc64aa2 100644
--- a/src/definitions.h
+++ b/src/definitions.h
@@ -34,7 +34,7 @@ const wxCmdLineEntryDesc Glob_cmdLineDesc[] = {
 		nullptr,
 		"input file(s)",
 		wxCMD_LINE_VAL_STRING,
-		wxCMD_LINE_PARAM_OPTIONAL | wxCMD_LINE_PARAM_MULTIPLE 
+		wxCMD_LINE_PARAM_OPTIONAL | wxCMD_LINE_PARAM_MULTIPLE
 	},
 	{wxCMD_LINE_NONE}
 };
@@ -56,7 +56,7 @@ const int TYRO_DEFAULT_FONT_SIZE = 10;
 enum myMargins
 {
 	MARGIN_FOLD,
-	MARGIN_LINE_NUMBERS
+	MARGIN_LINE_NUMBERS,
 };
 
 // Status bar sections
@@ -66,7 +66,7 @@ enum myStatusBarSections {
 	STATUS_CURRENT_LANGUAGE,
 	STATUS_LINE_ENDINGS,
 	STATUS_CODE_PAGE,
-	STATUS_INDENT
+	STATUS_INDENT,
 };
 
 // Top level menus
@@ -75,7 +75,7 @@ enum myMenuIds {
 	myEDIT_MENU,
 	myVIEW_MENU,
 	myLANG_MENU,
-	myHELP_MENU
+	myHELP_MENU,
 };
 
 // General Menu ids
@@ -89,12 +89,12 @@ enum myMenuItemIds {
 	myID_CLOSE_ALL,
 	myID_CLOSE_ALL_BUT_THIS,
 	myID_LINE_WRAP,
-	
+
 	// Preferences, to apply to all files
 	myID_PREFS_LINE_NUMBERS,
 	myID_PREFS_CODE_FOLDING,
 	myID_PREFS_IDENT_GUIDES,
-	myID_PREFS_FONT
+	myID_PREFS_FONT,
 };
 
 const wxString TYRO_FILE_OPEN_WILDCARDS =
diff --git a/src/widgets/EditorPane.cpp b/src/widgets/EditorPane.cpp
index fb3cf77..7e88f87 100644
--- a/src/widgets/EditorPane.cpp
+++ b/src/widgets/EditorPane.cpp
@@ -5,11 +5,45 @@
 #include "src/widgets/EditorPane.h"
 #include "src/widgets/TabContainer.h"
 
-extern StringConstMap Glob_lexer_map;
 extern LangConfig *Glob_lang_config;
 extern ThemeConfig *Glob_theme_config;
 extern wxConfigBase *Glob_config;
 
+/**
+ * Map language names to their appropriate lexers
+ */
+static StringConstMap LexerMap = {
+	{"", wxSTC_LEX_NULL},
+	{"batch", wxSTC_LEX_BATCH},
+	{"caml", wxSTC_LEX_CAML},
+	{"cmake", wxSTC_LEX_CMAKE},
+	{"cpp", wxSTC_LEX_CPP},
+	{"css", wxSTC_LEX_CSS},
+	{"fortran", wxSTC_LEX_FORTRAN},
+	{"haskell", wxSTC_LEX_HASKELL},
+	{"java", wxSTC_LEX_CPP},
+	{"js", wxSTC_LEX_CPP},
+	{"lisp", wxSTC_LEX_LISP},
+	{"lua", wxSTC_LEX_LUA},
+	{"makefile", wxSTC_LEX_MAKEFILE},
+	{"markdown", wxSTC_LEX_MARKDOWN},
+	{"php", wxSTC_LEX_HTML},
+	{"perl", wxSTC_LEX_PERL},
+	{"properties", wxSTC_LEX_PROPERTIES},
+	{"python", wxSTC_LEX_PYTHON},
+	{"ruby", wxSTC_LEX_RUBY},
+#ifdef wxSTC_LEX_RUST
+	{"rust", wxSTC_LEX_RUST},
+#else
+	{"rust", wxSTC_LEX_CPP},
+#endif
+	{"scheme", wxSTC_LEX_LISP},
+	{"shell", wxSTC_LEX_BASH},
+	{"sql", wxSTC_LEX_SQL},
+	{"xml", wxSTC_LEX_XML},
+	{"yaml", wxSTC_LEX_YAML},
+};
+
 /**
  * Constructor
  * 
@@ -85,9 +119,9 @@ void EditorPane::ApplyTheme(const string &lang, const string &theme)
 {
 	this->StyleClearAll();
 
-	if (Glob_lexer_map.count(lang) > 0)
+	if (LexerMap.count(lang) > 0)
 	{
-		this->SetLexer(Glob_lexer_map[lang]);
+		this->SetLexer(LexerMap[lang]);
 	}
 	else
 	{
diff --git a/src/widgets/EditorPane.h b/src/widgets/EditorPane.h
index e149a5e..6d25470 100644
--- a/src/widgets/EditorPane.h
+++ b/src/widgets/EditorPane.h
@@ -3,7 +3,6 @@
 #include "src/settings/LangConfig.h"
 #include "src/settings/ThemeConfig.h"
 
-
 class EditorPane: public wxStyledTextCtrl
 {
 public:
diff --git a/src/widgets/MainFrame.cpp b/src/widgets/MainFrame.cpp
index 10e4499..80d6aa5 100644
--- a/src/widgets/MainFrame.cpp
+++ b/src/widgets/MainFrame.cpp
@@ -20,7 +20,9 @@ MainFrame::MainFrame(wxFrame *frame, const wxString &title, const wxSize &size)
 	this->notebook = new TabContainer(this);
 
 	// Initialize other widgets
+#ifdef TYRO_FILETREE
 	this->fileTreePane = new FileTreePane(this);
+#endif
 	this->prefFrame = new PrefFrame();
 
 	// Set the frame icon
@@ -52,7 +54,9 @@ MainFrame::~MainFrame()
 	wxDELETE(this->findReplaceData);
 	wxDELETE(this->toolBar);
 	wxDELETE(this->prefFrame);
+#ifdef TYRO_FILETREE
 	wxDELETE(this->fileTreePane);
+#endif
 	this->manager->UnInit();
 
 	wxDELETE(this->notebook);
@@ -80,6 +84,7 @@ void MainFrame::MainLayout()
 		.Resizable(true);
 	this->manager->AddPane(this->toolBar, toolBarPaneInfo);
 
+#ifdef TYRO_FILETREE
 	wxAuiPaneInfo filePaneInfo;
 	filePaneInfo.Left()
 		.MinSize(225, 550)
@@ -87,6 +92,7 @@ void MainFrame::MainLayout()
 		.LeftDockable(true)
 		.Resizable(true);
 	this->manager->AddPane(this->fileTreePane, filePaneInfo);
+#endif
 
 	wxAuiPaneInfo notebookPaneInfo;
 	notebookPaneInfo.CenterPane();
@@ -142,7 +148,9 @@ wxAuiToolBar* MainFrame::SetupToolbar()
 	toolBar->AddTool(wxID_NEW, "New", new_file_icon, "New file");
 	toolBar->AddTool(wxID_OPEN, "Open", open_file_icon, "Open file");
 #ifdef __WXGTK__
+#ifdef TYRO_FILETREE
 	toolBar->AddTool(myID_OPEN_DIR, "Open Dir", open_folder_icon, "Open folder");
+#endif
 #endif
 	toolBar->AddTool(wxID_SAVE, "Save", save_file_icon, "Save file");
 
@@ -168,7 +176,9 @@ void MainFrame::BindEvents()
 	// File Menu Events
 	this->Bind(wxEVT_MENU, &MainFrame::OnNew, this, wxID_NEW);
 	this->Bind(wxEVT_MENU, &MainFrame::OnOpen, this, wxID_OPEN);
+#ifdef TYRO_FILETREE
 	this->Bind(wxEVT_MENU, &MainFrame::OnOpenFolder, this, myID_OPEN_DIR);
+#endif
 	this->Bind(wxEVT_MENU, &MainFrame::OnSave, this, wxID_SAVE);
 	this->Bind(wxEVT_MENU, &MainFrame::OnSaveAs, this, wxID_SAVEAS);
 	this->Bind(wxEVT_MENU, &MainFrame::OnCloseTab, this, wxID_CLOSE);
@@ -279,6 +289,7 @@ void MainFrame::OnOpen(wxCommandEvent &WXUNUSED(event))
 	this->OpenFiles(filelist);
 }
 
+#ifdef TYRO_FILETREE
 void MainFrame::OnOpenFolder(wxCommandEvent &event)
 {
 	wxDirDialog dlg(this, "Select Project Dir", wxEmptyString, wxDD_DEFAULT_STYLE | wxDD_DIR_MUST_EXIST | wxDD_CHANGE_DIR);
@@ -289,6 +300,7 @@ void MainFrame::OnOpenFolder(wxCommandEvent &event)
 
 	this->fileTreePane->CreateTree(path);
 }
+#endif
 
 /**
  * Open tabs containing the files passed
diff --git a/src/widgets/MainFrame.h b/src/widgets/MainFrame.h
index cee2d40..a6925a4 100644
--- a/src/widgets/MainFrame.h
+++ b/src/widgets/MainFrame.h
@@ -7,7 +7,10 @@
 #include "src/widgets/EditorPane.h"
 #include "src/widgets/TabContainer.h"
 #include "src/widgets/PrefFrame.h"
+
+#ifdef TYRO_FILETREE
 #include "src/widgets/FileTreePane.h"
+#endif
 
 class MainFrame: public wxFrame
 {
@@ -19,7 +22,9 @@ class MainFrame: public wxFrame
 		void OnPrefsChanged();
 	private:
 		PrefFrame *prefFrame = nullptr;
+#ifdef TYRO_FILETREE
 		FileTreePane *fileTreePane = nullptr;
+#endif
 		TabContainer *notebook = nullptr;
 		wxAuiManager *manager = nullptr;
 		wxAuiToolBar *toolBar = nullptr;
@@ -30,25 +35,27 @@ class MainFrame: public wxFrame
 		wxAuiToolBar* SetupToolbar();
 		void BindEvents();
 		void MainLayout();
-		
+
 		// Main Menu Event handlers
 		void OnNew(wxCommandEvent &event);
 		void OnOpen(wxCommandEvent &event);
+#ifdef TYRO_FILETREE
 		void OnOpenFolder(wxCommandEvent &event);
+#endif
 		void OnCloseAll(wxCommandEvent &event);
 		void OnSave(wxCommandEvent &event);
 		void OnSaveAs(wxCommandEvent &event);
-		
+
 		void OnEditFind(wxCommandEvent &event);
 		void OnEditReplace(wxCommandEvent &event);
 		void OnFindDialog(wxFindDialogEvent &event);
-		
+
 		void OnToggleWhitespace(wxCommandEvent &event);
 		void OnToggleLineWrap(wxCommandEvent &event);
 		void OnToggleLineEndings(wxCommandEvent &event);
-		
+
 		void OnLangSelect(wxCommandEvent &event);
-		
+
 		void OnCloseTab(wxCommandEvent &event);
 		void OnQuit(wxCommandEvent &event);
 		void OnAbout(wxCommandEvent &event);
diff --git a/src/widgets/TyroMenu.cpp b/src/widgets/TyroMenu.cpp
index 76a6571..f35cd35 100644
--- a/src/widgets/TyroMenu.cpp
+++ b/src/widgets/TyroMenu.cpp
@@ -4,7 +4,7 @@ extern LangConfig *Glob_lang_config;
 
 /**
  * Constructor
- */ 
+ */
 TyroMenu::TyroMenu()
 {
 	this->fileMenu = new wxMenu();
@@ -15,7 +15,7 @@ TyroMenu::TyroMenu()
 
 	this->SetupMainMenus();
 	this->SetupLangMenu();
-	
+
 	// Add the menus to the menubar
 	this->Insert(myFILE_MENU, fileMenu, "&File");
 	this->Insert(myEDIT_MENU, editMenu, "&Edit");
@@ -26,7 +26,7 @@ TyroMenu::TyroMenu()
 
 /**
  * Destructor
- */ 
+ */
 TyroMenu::~TyroMenu()
 {
 	wxLogDebug("TyroMenu Destructor Called.");
@@ -34,16 +34,18 @@ TyroMenu::~TyroMenu()
 
 /**
  * Setup basic menu items
- * 
+ *
  * @return void
- */ 
+ */
 void TyroMenu::SetupMainMenus()
 {
 	// Add items to top-level menus
 	this->fileMenu->Append(wxID_NEW, "&New\tCtrl+N", "Create a new file");
 	this->fileMenu->AppendSeparator();
 	this->fileMenu->Append(wxID_OPEN, "&Open\tCtrl+O", "Opens an existing file");
+#ifdef TYRO_FILETREE
 	this->fileMenu->Append(myID_OPEN_DIR, "&Open Dir\tShift+Ctrl+O", "Opens the selected folder in the sidebar");
+#endif
 	this->fileMenu->AppendSeparator();
 	this->fileMenu->Append(wxID_SAVE, "&Save\tCtrl+S", "Save the content");
 	this->fileMenu->Append(wxID_SAVEAS, "Save &As...\tShift+Ctrl+S", "Save current file as...");
@@ -51,7 +53,7 @@ void TyroMenu::SetupMainMenus()
 	this->fileMenu->Append(wxID_CLOSE, "&Close\tCtrl+W", "Close the current document");
 	this->fileMenu->Append(myID_CLOSE_ALL, "C&lose All\tShift+Ctrl+W", "Close all open documents.");
 	this->fileMenu->Append(wxID_EXIT, "&Quit\tCtrl+Q", "Quit the application");
-	
+
 	this->editMenu->Append(wxID_UNDO, "&Undo\tCtrl+Z", "Undo last action");
 	this->editMenu->Append(wxID_REDO, "&Redo\tCtrl+Y", "Redo last action");
 	this->editMenu->AppendSeparator();
@@ -70,7 +72,7 @@ void TyroMenu::SetupMainMenus()
 	this->viewMenu->AppendCheckItem(myID_VIEW_WHITESPACE, "Show Invisible Characters\tCtrl+Shift+I", "Toggle visibility of white space characters");
 	this->viewMenu->AppendCheckItem(myID_VIEW_LINE_ENDINGS, "Show line endings", "Toggle visibility of line ending characters");
 	this->viewMenu->AppendCheckItem(myID_LINE_WRAP, "Word Wrap", "Toggle wrapping of long lines");
-	
+
 	this->helpMenu->Append(wxID_ABOUT, "About Tyro", "Show info about this application");
 }
 
@@ -78,11 +80,11 @@ void TyroMenu::SetupMainMenus()
  * Create the language selection menu
  *
  * @return void
- */ 
+ */
 void TyroMenu::SetupLangMenu()
 {
 	StringMap languages = Glob_lang_config->GetLangList();
-	
+
 	for (const auto lang: languages)
 	{
 		langMenu->Append(wxID_ANY, lang.second, "Highlight file as " + lang.second, wxITEM_RADIO);
@@ -92,16 +94,16 @@ void TyroMenu::SetupLangMenu()
 /**
  * Enable/disable controls that require a file to be open
  *
- * @param bool enable 
+ * @param bool enable
  * @return void
- */ 
+ */
 void TyroMenu::EnableEditControls(bool enable)
 {
 	this->fileMenu->Enable(wxID_SAVE, enable);
 	this->fileMenu->Enable(wxID_SAVEAS, enable);
 	this->fileMenu->Enable(wxID_CLOSE, enable);
 	this->fileMenu->Enable(myID_CLOSE_ALL, enable);
-	
+
 	this->editMenu->Enable(wxID_UNDO, enable);
 	this->editMenu->Enable(wxID_REDO, enable);
 	this->editMenu->Enable(wxID_CUT, enable);
@@ -110,7 +112,7 @@ void TyroMenu::EnableEditControls(bool enable)
 	this->editMenu->Enable(wxID_SELECTALL, enable);
 	this->editMenu->Enable(wxID_FIND, enable);
 	this->editMenu->Enable(wxID_REPLACE, enable);
-	
+
 	// Enable/disable top level menus
 	this->EnableEntireMenu(myVIEW_MENU, this->viewMenu, enable);
 	this->EnableEntireMenu(myLANG_MENU, this->langMenu, enable);
@@ -118,7 +120,7 @@ void TyroMenu::EnableEditControls(bool enable)
 
 /**
  * Check the menu item associated with the specified id
- * 
+ *
  * @param int id
  * @param bool checked
  * @return void
@@ -136,7 +138,7 @@ void TyroMenu::SetIdChecked(int id, bool checked)
  * @param wxMenu* menu
  * @param bool enable
  * @return void
- */ 
+ */
 void TyroMenu::EnableEntireMenu(size_t menuId, wxMenu *menu, bool enable)
 {
 	// Toggle the top of the menu
@@ -148,7 +150,7 @@ void TyroMenu::EnableEntireMenu(size_t menuId, wxMenu *menu, bool enable)
 	for(auto item: list)
 	{
 		item->Enable(enable);
-		
+
 		// Uncheck all the items
 		if (item->IsCheckable())
 		{
@@ -159,7 +161,7 @@ void TyroMenu::EnableEntireMenu(size_t menuId, wxMenu *menu, bool enable)
 
 /**
  * Change the language used for highlighting
- * 
+ *
  * @param string lang
  * @return void
  */
@@ -169,6 +171,6 @@ void TyroMenu::SetCurrentLanguage(string lang)
 	{
 		lang = "Plain Text";
 	}
-	
+
 	this->Check(this->FindMenuItem("&Language", lang), true);
 }