diff --git a/src/common/platform/posix/cocoa/i_main.mm b/src/common/platform/posix/cocoa/i_main.mm
index 50353ba3de0..10f3a60ab63 100644
--- a/src/common/platform/posix/cocoa/i_main.mm
+++ b/src/common/platform/posix/cocoa/i_main.mm
@@ -348,7 +348,7 @@ - (BOOL)application:(NSApplication*)theApplication openFile:(NSString*)filename
 
 	for (size_t i = 0, count = s_argv.Size(); i < count; ++i)
 	{
-		if (0 == strcmp(s_argv[i], charFileName))
+		if (0 == strcmp(s_argv[i].GetChars(), charFileName))
 		{
 			return FALSE;
 		}
diff --git a/src/common/platform/posix/osx/i_specialpaths.mm b/src/common/platform/posix/osx/i_specialpaths.mm
index d51bd4ca5a4..7d55157efd2 100644
--- a/src/common/platform/posix/osx/i_specialpaths.mm
+++ b/src/common/platform/posix/osx/i_specialpaths.mm
@@ -105,7 +105,7 @@ FString M_GetAppDataPath(bool create)
 	}
 
 	path += "/" GAMENAMELOWERCASE;
-	if (create) CreatePath(path);
+	if (create) CreatePath(path.GetChars());
 	return path;
 }
 
@@ -127,7 +127,7 @@ FString M_GetCachePath(bool create)
 	}
 
 	path += "/zdoom/cache";
-	if (create) CreatePath(path);
+	if (create) CreatePath(path.GetChars());
 	return path;
 }
 
@@ -169,9 +169,9 @@ FString M_GetConfigPath(bool for_reading)
 	{
 		// There seems to be no way to get Preferences path via NSFileManager
 		path += "/Preferences/";
-		CreatePath(path);
+		CreatePath(path.GetChars());
 
-		if (!DirExists(path))
+		if (!DirExists(path.GetChars()))
 		{
 			path = FString();
 		}
@@ -200,7 +200,7 @@ FString M_GetScreenshotsPath()
 	{
 		path += "/" GAME_DIR "/Screenshots/";
 	}
-	CreatePath(path);
+	CreatePath(path.GetChars());
 	return path;
 }
 
@@ -241,7 +241,7 @@ FString M_GetDocumentsPath()
 		path += "/" GAME_DIR "/";
 	}
 
-	CreatePath(path);
+	CreatePath(path.GetChars());
 	return path;
 }
 
diff --git a/src/common/platform/posix/osx/iwadpicker_cocoa.mm b/src/common/platform/posix/osx/iwadpicker_cocoa.mm
index e72aa5aad5c..f680829bfee 100644
--- a/src/common/platform/posix/osx/iwadpicker_cocoa.mm
+++ b/src/common/platform/posix/osx/iwadpicker_cocoa.mm
@@ -86,13 +86,13 @@ - (IWADTableData *)init:(WadStuff *) wads num:(int) numwads
 	for(int i = 0;i < numwads;i++)
 	{
 		NSMutableDictionary *record = [[NSMutableDictionary alloc] initWithCapacity:NUM_COLUMNS];
-		const char* filename = strrchr(wads[i].Path, '/');
+		const char* filename = strrchr(wads[i].Path.GetChars(), '/');
 		if(filename == NULL)
-			filename = wads[i].Path;
+			filename = wads[i].Path.GetChars();
 		else
 			filename++;
 		[record setObject:[NSString stringWithUTF8String:filename] forKey:[NSString stringWithUTF8String:tableHeaders[COLUMN_IWAD]]];
-		[record setObject:[NSString stringWithUTF8String:wads[i].Name] forKey:[NSString stringWithUTF8String:tableHeaders[COLUMN_GAME]]];
+		[record setObject:[NSString stringWithUTF8String:wads[i].Name.GetChars()] forKey:[NSString stringWithUTF8String:tableHeaders[COLUMN_GAME]]];
 		[data addObject:record];
 		[record release];
 	}
@@ -397,9 +397,9 @@ static void RestartWithParameters(const WadStuff& wad, NSString* parameters)
 		[arguments addObject:GetArchitectureString()];
 		[arguments addObject:executablePath];
 		[arguments addObject:@"-iwad"];
-		[arguments addObject:[NSString stringWithUTF8String:wad.Path]];
+		[arguments addObject:[NSString stringWithUTF8String:wad.Path.GetChars()]];
 		[arguments addObject:@"+defaultiwad"];
-		[arguments addObject:[NSString stringWithUTF8String:wad.Name]];
+		[arguments addObject:[NSString stringWithUTF8String:wad.Name.GetChars()]];
 		[arguments addObject:cvarArgument];
 
 		for (int i = 1, count = Args->NumArgs(); i < count; ++i)
diff --git a/src/common/utility/cmdlib.cpp b/src/common/utility/cmdlib.cpp
index 88a37f362a2..b8c14045338 100644
--- a/src/common/utility/cmdlib.cpp
+++ b/src/common/utility/cmdlib.cpp
@@ -905,7 +905,7 @@ FString NicePath(const char *path)
 			slash = path + strlen(path);
 		}
 		FString who(path, slash - path);
-		pwstruct = getpwnam(who);
+		pwstruct = getpwnam(who.GetChars());
 	}
 	if (pwstruct == NULL)
 	{
diff --git a/src/gameconfigfile.cpp b/src/gameconfigfile.cpp
index 3e4f96c0071..a0f27899e70 100644
--- a/src/gameconfigfile.cpp
+++ b/src/gameconfigfile.cpp
@@ -108,10 +108,10 @@ FGameConfigFile::FGameConfigFile ()
 		SetValueForKey ("Path", ".", true);
 		SetValueForKey ("Path", "$DOOMWADDIR", true);
 #ifdef __APPLE__
-		SetValueForKey ("Path", user_docs, true);
-		SetValueForKey ("Path", user_app_support, true);
+		SetValueForKey ("Path", user_docs.GetChars(), true);
+		SetValueForKey ("Path", user_app_support.GetChars(), true);
 		SetValueForKey ("Path", "$PROGDIR", true);
-		SetValueForKey ("Path", local_app_support, true);
+		SetValueForKey ("Path", local_app_support.GetChars(), true);
 #elif !defined(__unix__)
 		SetValueForKey ("Path", "$HOME", true);
 		SetValueForKey ("Path", "$PROGDIR", true);
@@ -133,10 +133,10 @@ FGameConfigFile::FGameConfigFile ()
 	{
 		SetSection ("FileSearch.Directories", true);
 #ifdef __APPLE__
-		SetValueForKey ("Path", user_docs, true);
-		SetValueForKey ("Path", user_app_support, true);
+		SetValueForKey ("Path", user_docs.GetChars(), true);
+		SetValueForKey ("Path", user_app_support.GetChars(), true);
 		SetValueForKey ("Path", "$PROGDIR", true);
-		SetValueForKey ("Path", local_app_support, true);
+		SetValueForKey ("Path", local_app_support.GetChars(), true);
 #elif !defined(__unix__)
 		SetValueForKey ("Path", "$PROGDIR", true);
 #else
@@ -156,14 +156,14 @@ FGameConfigFile::FGameConfigFile ()
 	{
 		SetSection("SoundfontSearch.Directories", true);
 #ifdef __APPLE__
-		SetValueForKey("Path", user_docs + "/soundfonts", true);
-		SetValueForKey("Path", user_docs + "/fm_banks", true);
-		SetValueForKey("Path", user_app_support + "/soundfonts", true);
-		SetValueForKey("Path", user_app_support + "/fm_banks", true);
+		SetValueForKey("Path", (user_docs + "/soundfonts").GetChars(), true);
+		SetValueForKey("Path", (user_docs + "/fm_banks").GetChars(), true);
+		SetValueForKey("Path", (user_app_support + "/soundfonts").GetChars(), true);
+		SetValueForKey("Path", (user_app_support + "/fm_banks").GetChars(), true);
 		SetValueForKey("Path", "$PROGDIR/soundfonts", true);
 		SetValueForKey("Path", "$PROGDIR/fm_banks", true);
-		SetValueForKey("Path", local_app_support + "/soundfonts", true);
-		SetValueForKey("Path", local_app_support + "/fm_banks", true);
+		SetValueForKey("Path", (local_app_support + "/soundfonts").GetChars(), true);
+		SetValueForKey("Path", (local_app_support + "/fm_banks").GetChars(), true);
 #elif !defined(__unix__)
 		SetValueForKey("Path", "$PROGDIR/soundfonts", true);
 		SetValueForKey("Path", "$PROGDIR/fm_banks", true);
diff --git a/src/posix/i_steam.cpp b/src/posix/i_steam.cpp
index 82c2c9d9826..913ae398912 100644
--- a/src/posix/i_steam.cpp
+++ b/src/posix/i_steam.cpp
@@ -202,7 +202,7 @@ TArray<FString> I_GetSteamPath()
 
 		try
 		{
-			SteamInstallFolders = ParseSteamRegistry(regPath);
+			SteamInstallFolders = ParseSteamRegistry(regPath.GetChars());
 		}
 		catch(class CRecoverableError &error)
 		{
@@ -221,7 +221,7 @@ TArray<FString> I_GetSteamPath()
 		{
 			struct stat st;
 			FString candidate(SteamInstallFolders[i] + "/" + AppInfo[app].BasePath);
-			if(DirExists(candidate))
+			if(DirExists(candidate.GetChars()))
 				result.Push(candidate);
 		}
 	}