diff --git a/docker-run-cli/pyproject.toml b/docker-run-cli/pyproject.toml
index c2fbc2c..f086878 100644
--- a/docker-run-cli/pyproject.toml
+++ b/docker-run-cli/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "docker-run-cli"
-version = "0.9.2"
+version = "0.9.3"
 description = "'docker run' and 'docker exec' with useful defaults"
 license = {file = "LICENSE"}
 readme = "README.md"
diff --git a/docker-run-cli/src/docker_run/__init__.py b/docker-run-cli/src/docker_run/__init__.py
index 5143f87..09ffdf7 100644
--- a/docker-run-cli/src/docker_run/__init__.py
+++ b/docker-run-cli/src/docker_run/__init__.py
@@ -1,2 +1,2 @@
 __name__ = "docker-run"
-__version__ = "0.9.2"
\ No newline at end of file
+__version__ = "0.9.3"
\ No newline at end of file
diff --git a/docker-run-cli/src/docker_run/core.py b/docker-run-cli/src/docker_run/core.py
index d54637e..6b51630 100644
--- a/docker-run-cli/src/docker_run/core.py
+++ b/docker-run-cli/src/docker_run/core.py
@@ -7,7 +7,7 @@
 from typing import Any, Dict, List, Tuple
 
 import docker_run
-from docker_run.utils import log, runCommand
+from docker_run.utils import log, runCommand, validDockerContainerName
 from docker_run.plugins.plugin import Plugin
 
 # automatically load all available plugins inheriting from `Plugin`
@@ -21,6 +21,7 @@
             if isinstance(cls, type) and issubclass(cls, Plugin) and cls is not Plugin:
                 PLUGINS.append(cls)
 
+DEFAULT_CONTAINER_NAME = validDockerContainerName(os.path.basename(os.getcwd()))
 
 def parseArguments() -> Tuple[argparse.Namespace, List[str], List[str]]:
 
@@ -45,7 +46,7 @@ def format_help(self):
 
     parser.add_argument("--help", action="help", default=argparse.SUPPRESS, help="show this help message and exit")
     parser.add_argument("--image", help="image name (may also be specified without --image as last argument before command)")
-    parser.add_argument("--name", default=os.path.basename(os.getcwd()), help="container name; generates `docker exec` command if already running")
+    parser.add_argument("--name", default=DEFAULT_CONTAINER_NAME, help="container name; generates `docker exec` command if already running")
     parser.add_argument("--no-name", action="store_true", help="disable automatic container name (current directory)")
     parser.add_argument("--verbose", action="store_true", help="print generated command")
     parser.add_argument("--version", action="store_true", help="show program's version number and exit")
@@ -88,14 +89,19 @@ def buildDockerCommand(args: Dict[str, Any], unknown_args: List[str] = [], cmd_a
     # check for running container
     if args["no_name"]:
         args["name"] = None
-    new_container = False
-    running_containers = runCommand('docker ps --format "{{.Names}}"')[0].split('\n')
-    new_container = not (args["name"] in running_containers)
+        new_container = True
+    else:
+        new_container = False
+        running_containers = runCommand('docker ps --format "{{.Names}}"')[0].split('\n')
+        new_container = not (args["name"] in running_containers)
+        if not new_container and args["image"] is not None and len(args["image"]) > 0:
+            args["name"] = None if args["name"] == DEFAULT_CONTAINER_NAME else args["name"]
+            new_container = True
 
     if new_container: # docker run
 
         log_msg = f"Starting new container "
-        if not args["no_name"]:
+        if args["name"] is not None:
             log_msg += f"'{args['name']}'"
         log(log_msg + " ...")
         docker_cmd = ["docker", "run"]
diff --git a/docker-run-cli/src/docker_run/plugins/core.py b/docker-run-cli/src/docker_run/plugins/core.py
index c4d8982..38957b2 100644
--- a/docker-run-cli/src/docker_run/plugins/core.py
+++ b/docker-run-cli/src/docker_run/plugins/core.py
@@ -92,6 +92,9 @@ def x11GuiForwardingFlags(cls, docker_network: str = "bridge") -> List[str]:
         display = os.environ.get("DISPLAY")
         if display is None:
             return []
+        
+        if cls.OS == "Darwin":
+            runCommand(f"xhost +local:")
 
         xsock = "/tmp/.X11-unix"
         xauth = tempfile.NamedTemporaryFile(prefix='.docker.xauth.', delete=False).name
@@ -101,9 +104,9 @@ def x11GuiForwardingFlags(cls, docker_network: str = "bridge") -> List[str]:
         os.chmod(xauth, 0o777)
 
         if docker_network != "host" and not display.startswith(":"):
-            display="172.17.0.1:" + display.split(":")[1]
+            display = "172.17.0.1:" + display.split(":")[1]
         if cls.OS == "Darwin":
-            display="host.docker.internal:" + display.split(":")[1]
+            display = "host.docker.internal:" + display.split(":")[1]
 
         flags = []
         flags.append(f"--env DISPLAY={display}")
diff --git a/docker-run-cli/src/docker_run/utils.py b/docker-run-cli/src/docker_run/utils.py
index 8120027..c75122d 100644
--- a/docker-run-cli/src/docker_run/utils.py
+++ b/docker-run-cli/src/docker_run/utils.py
@@ -1,3 +1,4 @@
+import re
 import subprocess
 import sys
 from typing import Tuple
@@ -28,3 +29,21 @@ def runCommand(cmd: str, *args, **kwargs) -> Tuple[str, str]:
         raise RuntimeError(f"System command '{cmd}' failed: {exc.stderr.decode()}")
 
     return output.stdout.decode(), output.stderr.decode()
+
+
+def validDockerContainerName(name: str) -> str:
+    """Cleans a string such that it is a valid Docker container name.
+
+    [a-zA-Z0-9][a-zA-Z0-9_.-]
+
+    Args:
+        name (str): raw name
+
+    Returns:
+        str: valid container name
+    """
+    
+    name = re.sub('[^a-zA-Z0-9_.-]', '-', name)
+    name = re.sub('^[^a-zA-Z0-9]+', '', name)
+    
+    return name
diff --git a/docker-run-docker-ros/pyproject.toml b/docker-run-docker-ros/pyproject.toml
index 1b99393..8678337 100644
--- a/docker-run-docker-ros/pyproject.toml
+++ b/docker-run-docker-ros/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "docker-run-docker-ros"
-version = "1.0.1"
+version = "1.0.2"
 description = "docker-run plugin for Docker images built by docker-ros"
 license = {file = "LICENSE"}
 readme = "README.md"
diff --git a/docker-run-docker-ros/src/docker_run/plugins/docker_ros.py b/docker-run-docker-ros/src/docker_run/plugins/docker_ros.py
index ff5085a..63f920d 100644
--- a/docker-run-docker-ros/src/docker_run/plugins/docker_ros.py
+++ b/docker-run-docker-ros/src/docker_run/plugins/docker_ros.py
@@ -6,7 +6,7 @@
 from docker_run.plugins.plugin import Plugin
 
 
-__version__ = "1.0.1"
+__version__ = "1.0.2"
 
 
 class DockerRosPlugin(Plugin):
@@ -33,7 +33,9 @@ def getRunFlags(cls, args: Dict[str, Any], unknown_args: List[str]) -> List[str]
     @classmethod
     def getExecFlags(cls, args: Dict[str, Any], unknown_args: List[str]) -> List[str]:
         flags = []
-        if not args["no_user"] and runCommand(f"docker exec {args['name']} sh -c 'echo $DOCKER_ROS'")[0][:-1] == "1":
+        is_docker_ros = (runCommand(f"docker exec {args['name']} printenv DOCKER_ROS")[0][:-1] == "1")
+        is_non_root = (len(runCommand(f"docker exec {args['name']} printenv DOCKER_UID")[0][:-1]) > 0)
+        if not args["no_user"] and is_docker_ros and is_non_root:
             flags += cls.userExecFlags()
         return flags