Local itk-vtk-viewer

It is ready to install the itk-viewer in case it is not installed in qim https://www.notion.so/qim-dtu/Improve-CLI-viz-f4254522fa1e4159b8ce6d9206793b13

qim3d/viz/itk_vtk_viewer/helpers.py

@@ -19,9 +19,9 @@ def get_itk_dir() -> Path:
     return dir
 
 def get_nvm_dir(dir:Path = None) -> Path:
-    if platform.system() == 'Linux':
+    if platform.system() in [LINUX, MAC]:
         following_folder = ".nvm"
-    elif platform.system() == 'Windows':
+    elif platform.system() == WINDOWS:
         following_folder = ''
     return dir.joinpath(following_folder) if dir is not None else get_qim_dir().joinpath(following_folder)
 
@@ -31,10 +31,10 @@ def get_node_binaries_dir(nvm_dir:Path = None) -> Path:
 
     For windows we have to pass the argument nvm_dir and it is the itk-vtk_dir
     """
-    if platform.system() == "Linux":
+    if platform.system() in [LINUX, MAC]:
         following_folder = "versions/node"
         binaries_folder = 'bin'
-    elif platform.system() == 'Windows':
+    elif platform.system() == WINDOWS:
         following_folder = 'node-versions'
         binaries_folder = 'installation'
 
@@ -69,8 +69,7 @@ def run_for_platform(linux_func:Callable, windows_func:Callable, macos_func:Call
     elif this_platform == WINDOWS:
         return windows_func()
     elif this_platform == MAC:
-        # return macos_func()
-        raise NotImplementedError
+        return macos_func()
     
 def lambda_raise(err):
     raise err