diff --git a/src/kernel/synch.rs b/src/kernel/synch.rs
index af3f44e..83345f6 100644
--- a/src/kernel/synch.rs
+++ b/src/kernel/synch.rs
@@ -1,4 +1,3 @@
-use crate::kernel::thread_manager;
 use crate::utility::list::List;
 use crate::kernel::thread::Thread;
 use crate::simulator::interrupt::InterruptStatus::InterruptOff;
@@ -227,14 +226,14 @@ impl Condition {
     /// ### Parameters
     /// - **machine** the machine where the code is executed
     /// - **scheduler** the scheduler which determine which thread to execute
-    pub fn signal(&mut self, system: &mut System) {
-        let old_status = system.get_machine().interrupt.set_status(InterruptOff);
+    pub fn signal(&mut self, machine: &mut Machine, thread_manager: &mut ThreadManager) {
+        let old_status = machine.interrupt.set_status(InterruptOff);
 
         if self.waiting_queue.peek() != None {
-            system.get_thread_manager().ready_to_run(self.waiting_queue.pop().unwrap());
+            thread_manager.ready_to_run(self.waiting_queue.pop().unwrap());
         }
 
-        system.get_machine().interrupt.set_status(old_status);
+        machine.interrupt.set_status(old_status);
 
     }
 
@@ -244,13 +243,13 @@ impl Condition {
     /// ### Parameters
     /// - **machine** the machine where the code is executed
     /// - **scheduler** the scheduler which determine which thread to execute
-    pub fn broadcast(&mut self, system: &mut System) {
-        let old_status = system.get_machine().interrupt.set_status(InterruptOff);
+    pub fn broadcast(&mut self, machine: &mut Machine, thread_manager: &mut ThreadManager) {
+        let old_status = machine.interrupt.set_status(InterruptOff);
 
         while self.waiting_queue.peek() != None {
-            system.get_thread_manager().ready_to_run(self.waiting_queue.pop().unwrap());
+            thread_manager.ready_to_run(self.waiting_queue.pop().unwrap());
         }
-        system.get_machine().interrupt.set_status(old_status);
+        machine.interrupt.set_status(old_status);
 
     }
 
@@ -260,7 +259,7 @@ impl Condition {
 mod test {
     use std::{rc::Rc, cell::RefCell};
 
-    use crate::{kernel::{thread::Thread, synch::{Semaphore, Lock}, thread_manager::ThreadManager}, init_system, simulator::machine::Machine};
+    use crate::{kernel::{thread::Thread, synch::{Semaphore, Lock}, thread_manager::ThreadManager}, simulator::machine::Machine};
 
     #[test]
     fn test_semaphore_single() {
diff --git a/src/kernel/system.rs b/src/kernel/system.rs
index 5bda557..167a1ef 100644
--- a/src/kernel/system.rs
+++ b/src/kernel/system.rs
@@ -2,22 +2,8 @@
 //! 
 //! Module containing structs and methods pertaining to the state of the operating system
 
-use crate::simulator::machine::Machine;
-
 use super::{thread_manager::ThreadManager};
 
-/// This macro properly initializes the system
-#[macro_export]
-macro_rules! init_system {
-    () => {{
-        let m = Machine::init_machine();
-        init_system!(m)
-    }};
-    ($a:expr) => {{
-        $crate::System::new($a)
-    }};
-}
-
 /// # System
 /// 
 /// This structure represents the state of the threads running on the operating system.
@@ -30,40 +16,24 @@ macro_rules! init_system {
 /// - The scheduler which acts upon these threads
 #[derive(PartialEq)]
 pub struct System {
-    machine: Machine,
     thread_manager: ThreadManager
 }
 
 impl System {
 
-    /// System constructor
-    pub fn new(machine: Machine) -> System {
-        Self {
-            machine,
-            thread_manager: ThreadManager::new()
-        }
-    }
-
     // GETTERS
 
-    /// Returns the Machine
-    /// 
-    /// Useful to access RAM, devices, ...
-    pub fn get_machine(&mut self) -> &mut Machine {
-        &mut self.machine
-    }
-
     pub fn get_thread_manager(&mut self) -> &mut ThreadManager {
         &mut self.thread_manager
     }
 
-    // Setters
+}
 
-    /// Assign a machine to the system 
-    pub fn set_machine(&mut self, machine: Machine) {
-        self.machine = machine
+impl Default for System {
+    /// System constructor
+    fn default() -> Self {
+        Self { thread_manager: ThreadManager::new() }
     }
-
 }
 
 #[derive(PartialEq, Debug)]
@@ -75,15 +45,3 @@ pub enum ObjectType {
     ThreadType,
     InvalidType
 }
-
-#[cfg(test)]
-mod tests {
-
-    use crate::Machine;
-
-    #[test]
-    fn test_init_system() {
-        init_system!();
-    }
-
-}
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index b35b860..cc181fe 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,12 +13,10 @@ mod kernel;
 /// module containing useful tools which can be use in most part of the OS to ease the development of the OS
 pub mod utility;
 
-use std::{rc::Rc, cell::RefCell};
-
 use kernel::system::System;
 use simulator::machine::Machine;
 
 fn main() {
     let machine = Machine::init_machine();
-    let system = Rc::new(RefCell::new(System::new(machine)));
+    let system = System::default();
 }