diff --git a/README.md b/README.md
index e030165..5c7f7c6 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
   <img src="https://github.com/Gourieff/Assets/raw/main/sd-webui-reactor/ReActor_logo_red.png?raw=true" alt="logo" width="180px"/>
     
-  ![Version](https://img.shields.io/badge/version-0.5.0_alpha3-lightgreen?style=for-the-badge&labelColor=darkgreen)
+  ![Version](https://img.shields.io/badge/version-0.5.0_alpha4-lightgreen?style=for-the-badge&labelColor=darkgreen)
   
   <a href='https://ko-fi.com/gourieff' target='_blank'><img height='33' src='https://storage.ko-fi.com/cdn/kofi3.png?v=3' border='0' alt='Buy Me a Coffee at ko-fi.com' /></a>
   
diff --git a/README_RU.md b/README_RU.md
index a039fe9..14cb95e 100644
--- a/README_RU.md
+++ b/README_RU.md
@@ -2,7 +2,7 @@
 
   <img src="https://github.com/Gourieff/Assets/raw/main/sd-webui-reactor/ReActor_logo_red.png?raw=true" alt="logo" width="180px"/>
     
-  ![Version](https://img.shields.io/badge/версия-0.5.0_alpha3-lightgreen?style=for-the-badge&labelColor=darkgreen)
+  ![Version](https://img.shields.io/badge/версия-0.5.0_alpha4-lightgreen?style=for-the-badge&labelColor=darkgreen)
   
   <a href='https://ko-fi.com/gourieff' target='_blank'><img height='33' src='https://storage.ko-fi.com/cdn/kofi3.png?v=3' border='0' alt='Buy Me a Coffee at ko-fi.com' /></a>
   
diff --git a/install.py b/install.py
index c218e40..d7b9567 100644
--- a/install.py
+++ b/install.py
@@ -43,9 +43,12 @@ def get_sd_option(name: str, default: Any) -> Any:
     assert shared.opts.data is not None
     return shared.opts.data.get(name, default)
 
-def run_pip(*args):
+def pip_install(*args):
     subprocess.run([sys.executable, "-m", "pip", "install", *args])
 
+def pip_uninstall(*args):
+    subprocess.run([sys.executable, "-m", "pip", "uninstall", "-y", *args])
+
 def is_installed (
         package: str, version: str | None = None, strict: bool = True
 ):
@@ -96,10 +99,18 @@ with open(req_file) as file:
     install_count = 0
     try:
         ort = "onnxruntime-gpu"
-        import torch.cuda as cuda
-        if cuda.is_available():
+        import torch
+        if torch.cuda.is_available():
             if first_run:
                 last_device = "CUDA"
+        elif torch.backends.mps.is_available() or hasattr(torch,'dml'):
+            ort = "onnxruntime"
+            # to prevent errors when ORT-GPU is installed but we want ORT instead:
+            if first_run:
+                pip_uninstall("onnxruntime", "onnxruntime-gpu")
+            # just in case:
+            if last_device == "CUDA":
+                last_device = "CPU"
         else:
             if last_device == "CUDA":
                 last_device = "CPU"
@@ -107,7 +118,7 @@ with open(req_file) as file:
             txt.write(last_device)
         if not is_installed(ort,"1.16.1",False):
             install_count += 1
-            run_pip(ort)
+            pip_install(ort)
     except Exception as e:
         print(e)
         print(f"\nERROR: Failed to install {ort} - ReActor won't start")
@@ -125,7 +136,7 @@ with open(req_file) as file:
                 strict = False
             if not is_installed(package,package_version,strict):
                 install_count += 1
-                run_pip(package)
+                pip_install(package)
         except Exception as e:
             print(e)
             print(f"\nERROR: Failed to install {package} - ReActor won't start")
diff --git a/scripts/reactor_version.py b/scripts/reactor_version.py
index 6a2396d..b9eb334 100644
--- a/scripts/reactor_version.py
+++ b/scripts/reactor_version.py
@@ -1,5 +1,5 @@
 app_title = "ReActor"
-version_flag = "v0.5.0-a3"
+version_flag = "v0.5.0-a4"
 
 from scripts.reactor_logger import logger, get_Run, set_Run