diff --git a/dlls/winemac.drv/macdrv.h b/dlls/winemac.drv/macdrv.h
index d13a2277e61..bded3500bee 100644
--- a/dlls/winemac.drv/macdrv.h
+++ b/dlls/winemac.drv/macdrv.h
@@ -293,4 +293,21 @@ extern void macdrv_process_text_input(UINT vkey, UINT scan, UINT repeat, const B
 extern void macdrv_sent_text_input(const macdrv_event *event) DECLSPEC_HIDDEN;
 extern BOOL query_ime_char_rect(macdrv_query* query) DECLSPEC_HIDDEN;
 
+/* string helpers */
+
+static inline void ascii_to_unicode(WCHAR *dst, const char *src, size_t len)
+{
+    while (len--) *dst++ = (unsigned char)*src++;
+}
+
+static inline UINT asciiz_to_unicode(WCHAR *dst, const char *src)
+{
+    WCHAR *p = dst;
+    while ((*p++ = *src++));
+    return (p - dst) * sizeof(WCHAR);
+}
+
+/* FIXME: remove once we use unixlib */
+#define wcsrchr strrchrW
+
 #endif  /* __WINE_MACDRV_H */
diff --git a/dlls/winemac.drv/macdrv_main.c b/dlls/winemac.drv/macdrv_main.c
index fff72589417..fccd588c271 100644
--- a/dlls/winemac.drv/macdrv_main.c
+++ b/dlls/winemac.drv/macdrv_main.c
@@ -28,6 +28,7 @@
 #include "winuser.h"
 #include "winreg.h"
 #include "wine/server.h"
+#include "wine/unicode.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(macdrv);
 
@@ -102,16 +103,97 @@ const char* debugstr_cf(CFTypeRef t)
 }
 
 
+static HKEY reg_open_key(HKEY root, const WCHAR *name, ULONG name_len)
+{
+    UNICODE_STRING nameW = { name_len, name_len, (WCHAR *)name };
+    OBJECT_ATTRIBUTES attr;
+    HANDLE ret;
+
+    attr.Length = sizeof(attr);
+    attr.RootDirectory = root;
+    attr.ObjectName = &nameW;
+    attr.Attributes = 0;
+    attr.SecurityDescriptor = NULL;
+    attr.SecurityQualityOfService = NULL;
+
+    return NtOpenKeyEx(&ret, MAXIMUM_ALLOWED, &attr, 0) ? 0 : ret;
+}
+
+
+static HKEY open_hkcu_key(const char *name)
+{
+    WCHAR bufferW[256];
+    static HKEY hkcu;
+
+    if (!hkcu)
+    {
+        char buffer[256];
+        DWORD_PTR sid_data[(sizeof(TOKEN_USER) + SECURITY_MAX_SID_SIZE) / sizeof(DWORD_PTR)];
+        DWORD i, len = sizeof(sid_data);
+        SID *sid;
+
+        if (NtQueryInformationToken(GetCurrentThreadEffectiveToken(), TokenUser, sid_data, len, &len))
+            return 0;
+
+        sid = ((TOKEN_USER *)sid_data)->User.Sid;
+        len = sprintf(buffer, "\\Registry\\User\\S-%u-%u", sid->Revision,
+                       MAKELONG(MAKEWORD(sid->IdentifierAuthority.Value[5],
+                                         sid->IdentifierAuthority.Value[4]),
+                                MAKEWORD(sid->IdentifierAuthority.Value[3],
+                                         sid->IdentifierAuthority.Value[2])));
+        for (i = 0; i < sid->SubAuthorityCount; i++)
+            len += sprintf(buffer + len, "-%u", sid->SubAuthority[i]);
+
+        ascii_to_unicode(bufferW, buffer, len);
+        hkcu = reg_open_key(NULL, bufferW, len * sizeof(WCHAR));
+    }
+
+    return reg_open_key(hkcu, bufferW, asciiz_to_unicode(bufferW, name) - sizeof(WCHAR));
+}
+
+
+static ULONG query_reg_value(HKEY hkey, const WCHAR *name, KEY_VALUE_PARTIAL_INFORMATION *info, ULONG size)
+{
+    UNICODE_STRING str;
+
+    RtlInitUnicodeString(&str, name);
+    if (NtQueryValueKey(hkey, &str, KeyValuePartialInformation, info, size, &size))
+        return 0;
+
+    return size - FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data);
+}
+
+
 /***********************************************************************
  *              get_config_key
  *
  * Get a config key from either the app-specific or the default config
  */
 static inline DWORD get_config_key(HKEY defkey, HKEY appkey, const char *name,
-                                   char *buffer, DWORD size)
+                                   WCHAR *buffer, DWORD size)
 {
-    if (appkey && !RegQueryValueExA(appkey, name, 0, NULL, (LPBYTE)buffer, &size)) return 0;
-    if (defkey && !RegQueryValueExA(defkey, name, 0, NULL, (LPBYTE)buffer, &size)) return 0;
+    WCHAR nameW[128];
+    char buf[2048];
+    KEY_VALUE_PARTIAL_INFORMATION *info = (void *)buf;
+
+    asciiz_to_unicode(nameW, name);
+
+    if (appkey && query_reg_value(appkey, nameW, info, sizeof(buf)))
+    {
+        size = min(info->DataLength, size - sizeof(WCHAR));
+        memcpy(buffer, info->Data, size);
+        buffer[size / sizeof(WCHAR)] = 0;
+        return 0;
+    }
+
+    if (defkey && query_reg_value(defkey, nameW, info, sizeof(buf)))
+    {
+        size = min(info->DataLength, size - sizeof(WCHAR));
+        memcpy(buffer, info->Data, size);
+        buffer[size / sizeof(WCHAR)] = 0;
+        return 0;
+    }
+
     return ERROR_FILE_NOT_FOUND;
 }
 
@@ -123,36 +205,41 @@ static inline DWORD get_config_key(HKEY defkey, HKEY appkey, const char *name,
  */
 static void setup_options(void)
 {
-    char buffer[MAX_PATH + 16];
+    static const WCHAR macdriverW[] = {'\\','M','a','c',' ','D','r','i','v','e','r',0};
+    WCHAR buffer[MAX_PATH + 16], *p, *appname;
     HKEY hkey, appkey = 0;
     DWORD len;
 
     /* @@ Wine registry key: HKCU\Software\Wine\Mac Driver */
-    if (RegOpenKeyA(HKEY_CURRENT_USER, "Software\\Wine\\Mac Driver", &hkey)) hkey = 0;
+    hkey = open_hkcu_key("Software\\Wine\\Mac Driver");
 
     /* open the app-specific key */
 
-    len = GetModuleFileNameA(0, buffer, MAX_PATH);
+    appname = NtCurrentTeb()->Peb->ProcessParameters->ImagePathName.Buffer;
+    if ((p = wcsrchr(appname, '/'))) appname = p + 1;
+    if ((p = wcsrchr(appname, '\\'))) appname = p + 1;
+    len = lstrlenW(appname);
+
     if (len && len < MAX_PATH)
     {
         HKEY tmpkey;
-        char *p, *appname = buffer;
-        if ((p = strrchr(appname, '/'))) appname = p + 1;
-        if ((p = strrchr(appname, '\\'))) appname = p + 1;
-        strcat(appname, "\\Mac Driver");
+        memcpy(buffer, appname, len * sizeof(WCHAR));
+        memcpy(buffer + len, macdriverW, sizeof(macdriverW));
         /* @@ Wine registry key: HKCU\Software\Wine\AppDefaults\app.exe\Mac Driver */
-        if (!RegOpenKeyA(HKEY_CURRENT_USER, "Software\\Wine\\AppDefaults", &tmpkey))
+        if ((tmpkey = open_hkcu_key("Software\\Wine\\AppDefaults")))
         {
-            if (RegOpenKeyA(tmpkey, appname, &appkey)) appkey = 0;
-            RegCloseKey(tmpkey);
+            appkey = reg_open_key(tmpkey, buffer, lstrlenW(buffer) * sizeof(WCHAR));
+            NtClose(tmpkey);
         }
     }
 
     if (!get_config_key(hkey, appkey, "WindowsFloatWhenInactive", buffer, sizeof(buffer)))
     {
-        if (!strcmp(buffer, "none"))
+        static const WCHAR noneW[] = {'n','o','n','e',0};
+        static const WCHAR allW[] = {'a','l','l',0};
+        if (!lstrcmpW(buffer, noneW))
             topmost_float_inactive = TOPMOST_FLOAT_INACTIVE_NONE;
-        else if (!strcmp(buffer, "all"))
+        else if (!lstrcmpW(buffer, allW))
             topmost_float_inactive = TOPMOST_FLOAT_INACTIVE_ALL;
         else
             topmost_float_inactive = TOPMOST_FLOAT_INACTIVE_NONFULLSCREEN;
@@ -206,9 +293,11 @@ static void setup_options(void)
 
     if (!get_config_key(hkey, appkey, "OpenGLSurfaceMode", buffer, sizeof(buffer)))
     {
-        if (!strcmp(buffer, "transparent"))
+        static const WCHAR transparentW[] = {'t','r','a','n','s','p','a','r','e','n','t',0};
+        static const WCHAR behindW[] = {'b','e','h','i','n','d',0};
+        if (!lstrcmpW(buffer, transparentW))
             gl_surface_mode = GL_SURFACE_IN_FRONT_TRANSPARENT;
-        else if (!strcmp(buffer, "behind"))
+        else if (!lstrcmpW(buffer, behindW))
             gl_surface_mode = GL_SURFACE_BEHIND;
         else
             gl_surface_mode = GL_SURFACE_IN_FRONT_OPAQUE;
@@ -222,8 +311,8 @@ static void setup_options(void)
     if (!get_config_key(hkey, NULL, "RetinaMode", buffer, sizeof(buffer)))
         retina_enabled = IS_OPTION_TRUE(buffer[0]);
 
-    if (appkey) RegCloseKey(appkey);
-    if (hkey) RegCloseKey(hkey);
+    if (appkey) NtClose(appkey);
+    if (hkey) NtClose(hkey);
 }