diff --git a/native/libmacbridge/bridge.h b/native/libmacbridge/bridge.h
index d6ff506..9a841da 100644
--- a/native/libmacbridge/bridge.h
+++ b/native/libmacbridge/bridge.h
@@ -42,7 +42,19 @@ void send_vkey(int32_t vk);
 /*
  * Send the backspace keypress, *count* times.
  */
-extern "C" void delete_string(int32_t count);
+void delete_string(int32_t count);
+
+// SYSTEM
+
+/*
+ * Return the active NSRunningApplication path
+ */
+int32_t get_active_app_bundle(char * buffer, int32_t size);
+
+/*
+ * Return the active NSRunningApplication bundle identifier
+ */
+int32_t get_active_app_identifier(char * buffer, int32_t size);
 
 };
 
diff --git a/native/libmacbridge/bridge.mm b/native/libmacbridge/bridge.mm
index 898c0e0..237de23 100644
--- a/native/libmacbridge/bridge.mm
+++ b/native/libmacbridge/bridge.mm
@@ -96,4 +96,24 @@ void send_vkey(int32_t vk) {
 
         usleep(2000);
     });
+}
+
+int32_t get_active_app_bundle(char * buffer, int32_t size) {
+    NSRunningApplication *frontApp = [[NSWorkspace sharedWorkspace] frontmostApplication];
+    NSString *bundlePath = [frontApp bundleURL].path;
+    const char * path = [bundlePath UTF8String];
+
+    snprintf(buffer, size, "%s", path);
+
+    return 1;
+}
+
+int32_t get_active_app_identifier(char * buffer, int32_t size) {
+    NSRunningApplication *frontApp = [[NSWorkspace sharedWorkspace] frontmostApplication];
+    NSString *bundlePath = frontApp.bundleIdentifier;
+    const char * path = [bundlePath UTF8String];
+
+    snprintf(buffer, size, "%s", path);
+
+    return 1;
 }
\ No newline at end of file
diff --git a/src/bridge/macos.rs b/src/bridge/macos.rs
index cbd0552..5181608 100644
--- a/src/bridge/macos.rs
+++ b/src/bridge/macos.rs
@@ -3,6 +3,11 @@ use std::os::raw::{c_void, c_char};
 #[allow(improper_ctypes)]
 #[link(name="macbridge", kind="static")]
 extern {
+    // System
+    pub fn get_active_app_bundle(buffer: *mut c_char, size: i32) -> i32;
+    pub fn get_active_app_identifier(buffer: *mut c_char, size: i32) -> i32;
+
+    // Keyboard
     pub fn register_keypress_callback(s: *const c_void,
                                   cb: extern fn(_self: *mut c_void, *const u8,
                                                 i32, i32, i32));
diff --git a/src/config.rs b/src/config.rs
index 48bb366..e25e299 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -240,6 +240,24 @@ impl <S: SystemManager> ConfigManager for RuntimeConfigManager<S> {
             }*/
         }
 
+        let active_calss = self.system_manager.get_current_window_class();
+
+        if let Some(class) = active_calss {
+            debug!("=> Class: '{}'", class);
+
+            // TODO
+            /*for (i, regex) in self.title_regexps.iter().enumerate() {
+                if let Some(regex) = regex {
+                    if regex.is_match(&title) {
+                        debug!("Matched 'filter_title' for '{}' config, using custom settings.",
+                               self.set.specific[i].name);
+
+                        return &self.set.specific[i]
+                    }
+                }
+            }*/
+        }
+
         // No matches, return the default mapping
         debug!("No matches for custom configs, using default settings.");
         &self.set.default
diff --git a/src/system/macos.rs b/src/system/macos.rs
index 0b5532b..0c5746e 100644
--- a/src/system/macos.rs
+++ b/src/system/macos.rs
@@ -1,6 +1,7 @@
 use std::os::raw::c_char;
 
 use std::ffi::CStr;
+use crate::bridge::macos::{get_active_app_bundle, get_active_app_identifier};
 
 pub struct MacSystemManager {
 
@@ -8,15 +9,43 @@ pub struct MacSystemManager {
 
 impl super::SystemManager for MacSystemManager {
     fn get_current_window_title(&self) -> Option<String> {
-        unimplemented!()
+        self.get_current_window_class()
     }
 
     fn get_current_window_class(&self) -> Option<String> {
-        unimplemented!();
+        unsafe {
+            let mut buffer : [c_char; 250] = [0; 250];
+            let res = get_active_app_identifier(buffer.as_mut_ptr(), buffer.len() as i32);
+
+            if res > 0 {
+                let c_string = CStr::from_ptr(buffer.as_ptr());
+
+                let string = c_string.to_str();
+                if let Ok(string) = string {
+                    return Some((*string).to_owned());
+                }
+            }
+        }
+
+        None
     }
 
     fn get_current_window_executable(&self) -> Option<String> {
-        unimplemented!()
+        unsafe {
+            let mut buffer : [c_char; 250] = [0; 250];
+            let res = get_active_app_bundle(buffer.as_mut_ptr(), buffer.len() as i32);
+
+            if res > 0 {
+                let c_string = CStr::from_ptr(buffer.as_ptr());
+
+                let string = c_string.to_str();
+                if let Ok(string) = string {
+                    return Some((*string).to_owned());
+                }
+            }
+        }
+
+        None
     }
 }