diff --git a/SConstruct b/SConstruct
index 05885c0b5..4f04be624 100644
--- a/SConstruct
+++ b/SConstruct
@@ -2,6 +2,7 @@ import os
 import subprocess
 import sys
 import sysconfig
+import platform
 import shlex
 import numpy as np
 
@@ -23,8 +24,19 @@ AddOption('--minimal',
           default=os.path.exists(File('#.gitattributes').abspath), # minimal by default on release branch (where there's no LFS)
           help='the minimum build to run openpilot. no tests, tools, etc.')
 
-# Detect platform (see scripts/platform.sh)
-arch = subprocess.check_output(["bash", "-c", "source scripts/platform.sh >&2 && echo $OPENPILOT_ARCH"], encoding='utf8', stderr=subprocess.PIPE).rstrip()
+# Detect platform
+arch = subprocess.check_output(["uname", "-m"], encoding='utf8').rstrip()
+if platform.system() == "Darwin":
+  arch = "Darwin"
+  brew_prefix = subprocess.check_output(['brew', '--prefix'], encoding='utf8').strip()
+elif arch == "aarch64" and os.path.isfile('/TICI'):
+  arch = "larch64"
+assert arch in [
+  "larch64",  # linux tici arm64
+  "aarch64",  # linux pc arm64
+  "x86_64",   # linux pc x64
+  "Darwin",   # macOS arm64 (x86 not supported)
+]
 
 env = Environment(
   ENV={
@@ -91,7 +103,6 @@ if arch == "larch64":
   env.Append(CCFLAGS=arch_flags)
   env.Append(CXXFLAGS=arch_flags)
 elif arch == "Darwin":
-  brew_prefix = subprocess.check_output(['brew', '--prefix'], encoding='utf8').strip()
   env.Append(LIBPATH=[
     f"{brew_prefix}/lib",
     f"{brew_prefix}/opt/openssl@3.0/lib",
diff --git a/scripts/platform.sh b/scripts/platform.sh
deleted file mode 100755
index 1cbd8aa60..000000000
--- a/scripts/platform.sh
+++ /dev/null
@@ -1,51 +0,0 @@
-#!/usr/bin/env bash
-#
-# Centralized platform and architecture detection for openpilot.
-# Source this script to get OPENPILOT_ARCH set to one of:
-#   larch64  - linux tici arm64
-#   aarch64  - linux pc arm64
-#   x86_64   - linux pc x64
-#   Darwin   - macOS arm64
-#
-
-RED='\033[0;31m'
-GREEN='\033[0;32m'
-NC='\033[0m'
-
-OPENPILOT_ARCH=$(uname -m)
-
-# ── check OS and normalize arch ──────────────────────────────
-if [ -f /TICI ]; then
-  # TICI runs AGNOS — no OS validation needed
-  OPENPILOT_ARCH="larch64"
-
-elif [[ "$OSTYPE" == "darwin"* ]]; then
-  if [[ "$OPENPILOT_ARCH" == "x86_64" ]]; then
-    echo -e " ↳ [${RED}✗${NC}] Intel-based Macs are not supported!"
-    echo "       openpilot requires an Apple Silicon Mac (M1 or newer)."
-    exit 1
-  fi
-  echo -e " ↳ [${GREEN}✔${NC}] macOS detected."
-  OPENPILOT_ARCH="Darwin"
-
-elif [[ "$OSTYPE" == "linux-gnu"* ]]; then
-  if [ -f "/etc/os-release" ]; then
-    source /etc/os-release
-    case "$VERSION_CODENAME" in
-      "jammy" | "kinetic" | "noble" | "focal")
-        echo -e " ↳ [${GREEN}✔${NC}] Ubuntu $VERSION_CODENAME detected."
-        ;;
-      *)
-        echo -e " ↳ [${RED}✗${NC}] Incompatible Ubuntu version $VERSION_CODENAME detected!"
-        exit 1
-        ;;
-    esac
-  else
-    echo -e " ↳ [${RED}✗${NC}] No /etc/os-release on your system. Make sure you're running on Ubuntu, or similar!"
-    exit 1
-  fi
-
-else
-  echo -e " ↳ [${RED}✗${NC}] OS type $OSTYPE not supported!"
-  exit 1
-fi
diff --git a/third_party/acados/build.sh b/third_party/acados/build.sh
index cca174350..95b3913c4 100755
--- a/third_party/acados/build.sh
+++ b/third_party/acados/build.sh
@@ -6,11 +6,10 @@ export ZERO_AR_DATE=1
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
 
-source "$DIR/../../scripts/platform.sh"
-ARCHNAME="$OPENPILOT_ARCH"
-
+ARCHNAME="x86_64"
 BLAS_TARGET="X64_AUTOMATIC"
 if [ -f /TICI ]; then
+  ARCHNAME="larch64"
   BLAS_TARGET="ARMV8A_ARM_CORTEX_A57"
 fi
 
@@ -18,6 +17,7 @@ ACADOS_FLAGS="-DACADOS_WITH_QPOASES=ON -UBLASFEO_TARGET -DBLASFEO_TARGET=$BLAS_T
 
 if [[ "$OSTYPE" == "darwin"* ]]; then
   ACADOS_FLAGS="$ACADOS_FLAGS -DCMAKE_OSX_ARCHITECTURES=arm64 -DCMAKE_MACOSX_RPATH=1"
+  ARCHNAME="Darwin"
 fi
 
 if [ ! -d acados_repo/ ]; then
diff --git a/third_party/libyuv/build.sh b/third_party/libyuv/build.sh
index 0e4e10133..11f88ab46 100755
--- a/third_party/libyuv/build.sh
+++ b/third_party/libyuv/build.sh
@@ -6,8 +6,14 @@ export ZERO_AR_DATE=1
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
 
-source "$DIR/../../scripts/platform.sh"
-ARCHNAME="$OPENPILOT_ARCH"
+ARCHNAME=$(uname -m)
+if [ -f /TICI ]; then
+  ARCHNAME="larch64"
+fi
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+  ARCHNAME="Darwin"
+fi
 
 cd $DIR
 if [ ! -d libyuv ]; then
diff --git a/third_party/raylib/build.sh b/third_party/raylib/build.sh
index b8408cd88..d20f9d33a 100755
--- a/third_party/raylib/build.sh
+++ b/third_party/raylib/build.sh
@@ -20,9 +20,9 @@ cd $DIR
 
 RAYLIB_PLATFORM="PLATFORM_DESKTOP"
 
-source "$DIR/../../scripts/platform.sh"
-ARCHNAME="$OPENPILOT_ARCH"
+ARCHNAME=$(uname -m)
 if [ -f /TICI ]; then
+  ARCHNAME="larch64"
   RAYLIB_PLATFORM="PLATFORM_COMMA"
 elif [[ "$OSTYPE" == "linux"* ]]; then
   # required dependencies on Linux PC
@@ -33,6 +33,10 @@ elif [[ "$OSTYPE" == "linux"* ]]; then
     libxrandr-dev
 fi
 
+if [[ "$OSTYPE" == "darwin"* ]]; then
+  ARCHNAME="Darwin"
+fi
+
 INSTALL_DIR="$DIR/$ARCHNAME"
 rm -rf $INSTALL_DIR
 mkdir -p $INSTALL_DIR
diff --git a/tools/install_python_dependencies.sh b/tools/install_python_dependencies.sh
index bf7accbbd..4454845fc 100755
--- a/tools/install_python_dependencies.sh
+++ b/tools/install_python_dependencies.sh
@@ -23,7 +23,7 @@ echo "installing python packages..."
 uv sync --frozen --all-extras
 source .venv/bin/activate
 
-if [[ "$OSTYPE" == "darwin"* ]]; then
+if [[ "$(uname)" == 'Darwin' ]]; then
   touch "$ROOT"/.env
   echo "export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES" >> "$ROOT"/.env
 fi
diff --git a/tools/mac_setup.sh b/tools/mac_setup.sh
index 7e126d4f5..82748e961 100755
--- a/tools/mac_setup.sh
+++ b/tools/mac_setup.sh
@@ -3,7 +3,6 @@ set -e
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"
 ROOT="$(cd $DIR/../ && pwd)"
-source $ROOT/scripts/platform.sh
 
 # homebrew update is slow
 export HOMEBREW_NO_AUTO_UPDATE=1
diff --git a/tools/op.sh b/tools/op.sh
index afee4cfb7..8c41926e0 100755
--- a/tools/op.sh
+++ b/tools/op.sh
@@ -122,7 +122,33 @@ function op_check_git() {
 
 function op_check_os() {
   echo "Checking for compatible os version..."
-  source "$OPENPILOT_ROOT/scripts/platform.sh"
+  if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+
+    if [ -f "/etc/os-release" ]; then
+      source /etc/os-release
+      case "$VERSION_CODENAME" in
+        "jammy" | "kinetic" | "noble" | "focal")
+          echo -e " ↳ [${GREEN}✔${NC}] Ubuntu $VERSION_CODENAME detected."
+          ;;
+        * )
+          echo -e " ↳ [${RED}✗${NC}] Incompatible Ubuntu version $VERSION_CODENAME detected!"
+          loge "ERROR_INCOMPATIBLE_UBUNTU" "$VERSION_CODENAME"
+          return 1
+          ;;
+      esac
+    else
+      echo -e " ↳ [${RED}✗${NC}] No /etc/os-release on your system. Make sure you're running on Ubuntu, or similar!"
+      loge "ERROR_UNKNOWN_UBUNTU"
+      return 1
+    fi
+
+  elif [[ "$OSTYPE" == "darwin"* ]]; then
+    echo -e " ↳ [${GREEN}✔${NC}] macOS detected."
+  else
+    echo -e " ↳ [${RED}✗${NC}] OS type $OSTYPE not supported!"
+    loge "ERROR_UNKNOWN_OS" "$OSTYPE"
+    return 1
+  fi
 }
 
 function op_check_python() {