diff --git a/src/Router.tsx b/src/Router.tsx
index f8ec890a5..16bb526d4 100644
--- a/src/Router.tsx
+++ b/src/Router.tsx
@@ -31,6 +31,7 @@ import {
 } from './lib/tauriFS'
 import { metadata, type Metadata } from 'tauri-plugin-fs-extra-api'
 import DownloadAppBanner from './components/DownloadAppBanner'
+import { WasmErrBanner } from './components/WasmErrBanner'
 import { GlobalStateProvider } from './components/GlobalStateProvider'
 import {
   SETTINGS_PERSIST_KEY,
@@ -150,6 +151,7 @@ const router = createBrowserRouter(
               <ModelingMachineProvider>
                 <App />
               </ModelingMachineProvider>
+              <WasmErrBanner />
             </KclContextProvider>
           </FileMachineProvider>
           {!isTauri() && import.meta.env.PROD && <DownloadAppBanner />}
diff --git a/src/components/WasmErrBanner.tsx b/src/components/WasmErrBanner.tsx
new file mode 100644
index 000000000..239c58e2d
--- /dev/null
+++ b/src/components/WasmErrBanner.tsx
@@ -0,0 +1,63 @@
+import { Dialog } from '@headlessui/react'
+import { useState } from 'react'
+import { ActionButton } from './ActionButton'
+import { faX } from '@fortawesome/free-solid-svg-icons'
+import { useKclContext } from 'lang/KclSinglton'
+
+export function WasmErrBanner() {
+  const [isBannerDismissed, setBannerDismissed] = useState(false)
+
+  const { wasmInitFailed } = useKclContext()
+
+  if (!wasmInitFailed) return null
+
+  return (
+    <Dialog
+      className="fixed inset-0 top-auto z-50 bg-warn-20 text-warn-80 px-8 py-4"
+      open={!isBannerDismissed}
+      onClose={() => ({})}
+    >
+      <Dialog.Panel className="max-w-3xl mx-auto">
+        <div className="flex gap-2 justify-between items-start">
+          <h2 className="text-xl font-bold mb-4">
+            Problem with our WASM blob :(
+          </h2>
+          <ActionButton
+            Element="button"
+            onClick={() => setBannerDismissed(true)}
+            icon={{
+              icon: faX,
+              bgClassName:
+                'bg-warn-70 hover:bg-warn-80 dark:bg-warn-70 dark:hover:bg-warn-80',
+              iconClassName:
+                'text-warn-10 group-hover:text-warn-10 dark:text-warn-10 dark:group-hover:text-warn-10',
+            }}
+            className="!p-0 !bg-transparent !border-transparent"
+          />
+        </div>
+        <p>
+          <a
+            href="https://webassembly.org/"
+            rel="noopener noreferrer"
+            target="_blank"
+            className="text-warn-80 dark:text-warn-80 dark:hover:text-warn-70 underline"
+          >
+            WASM or web assembly
+          </a>{' '}
+          is core part of how our app works. It might because you OS is not
+          up-to-date. If you're able to update your OS to a later version, try
+          that. If not create an issue on{' '}
+          <a
+            href="https://github.com/KittyCAD/modeling-app"
+            rel="noopener noreferrer"
+            target="_blank"
+            className="text-warn-80 dark:text-warn-80 dark:hover:text-warn-70 underline"
+          >
+            our Github
+          </a>
+          .
+        </p>
+      </Dialog.Panel>
+    </Dialog>
+  )
+}
diff --git a/src/lang/KclSinglton.tsx b/src/lang/KclSinglton.tsx
index 7f8e7085b..cbd665096 100644
--- a/src/lang/KclSinglton.tsx
+++ b/src/lang/KclSinglton.tsx
@@ -40,6 +40,7 @@ class KclManager {
   private _logs: string[] = []
   private _kclErrors: KCLError[] = []
   private _isExecuting = false
+  private _wasmInitFailed = true
 
   engineCommandManager: EngineCommandManager
   private _defferer = deferExecution((code: string) => {
@@ -47,12 +48,13 @@ class KclManager {
     this.executeAst(ast)
   }, 600)
 
-  private _isExecutingCallback: (a: boolean) => void = () => {}
+  private _isExecutingCallback: (arg: boolean) => void = () => {}
   private _codeCallBack: (arg: string) => void = () => {}
   private _astCallBack: (arg: Program) => void = () => {}
   private _programMemoryCallBack: (arg: ProgramMemory) => void = () => {}
   private _logsCallBack: (arg: string[]) => void = () => {}
   private _kclErrorsCallBack: (arg: KCLError[]) => void = () => {}
+  private _wasmInitFailedCallback: (arg: boolean) => void = () => {}
 
   get ast() {
     return this._ast
@@ -106,6 +108,14 @@ class KclManager {
     this._isExecutingCallback(isExecuting)
   }
 
+  get wasmInitFailed() {
+    return this._wasmInitFailed
+  }
+  set wasmInitFailed(wasmInitFailed) {
+    this._wasmInitFailed = wasmInitFailed
+    this._wasmInitFailedCallback(wasmInitFailed)
+  }
+
   constructor(engineCommandManager: EngineCommandManager) {
     this.engineCommandManager = engineCommandManager
     const storedCode = localStorage.getItem(PERSIST_CODE_TOKEN)
@@ -131,6 +141,7 @@ class KclManager {
     setLogs,
     setKclErrors,
     setIsExecuting,
+    setWasmInitFailed,
   }: {
     setCode: (arg: string) => void
     setProgramMemory: (arg: ProgramMemory) => void
@@ -138,6 +149,7 @@ class KclManager {
     setLogs: (arg: string[]) => void
     setKclErrors: (arg: KCLError[]) => void
     setIsExecuting: (arg: boolean) => void
+    setWasmInitFailed: (arg: boolean) => void
   }) {
     this._codeCallBack = setCode
     this._programMemoryCallBack = setProgramMemory
@@ -145,11 +157,23 @@ class KclManager {
     this._logsCallBack = setLogs
     this._kclErrorsCallBack = setKclErrors
     this._isExecutingCallback = setIsExecuting
+    this._wasmInitFailedCallback = setWasmInitFailed
+  }
+
+  async ensureWasmInit() {
+    try {
+      await initPromise
+      if (this.wasmInitFailed) {
+        this.wasmInitFailed = false
+      }
+    } catch (e) {
+      this.wasmInitFailed = true
+    }
   }
 
   async executeAst(ast: Program = this._ast, updateCode = false) {
+    await this.ensureWasmInit()
     this.isExecuting = true
-    await initPromise
     const { logs, errors, programMemory } = await executeAst({
       ast,
       engineCommandManager: this.engineCommandManager,
@@ -166,7 +190,7 @@ class KclManager {
     }
   }
   async executeAstMock(ast: Program = this._ast, updateCode = false) {
-    await initPromise
+    await this.ensureWasmInit()
     const newCode = recast(ast)
     const newAst = parse(newCode)
     await this?.engineCommandManager?.waitForReady
@@ -186,7 +210,7 @@ class KclManager {
     this._programMemory = programMemory
   }
   async executeCode(code?: string) {
-    await initPromise
+    await this.ensureWasmInit()
     await this?.engineCommandManager?.waitForReady
     if (!this?.engineCommandManager?.planesInitialized()) return
     const result = await executeCode({
@@ -306,6 +330,7 @@ const KclContext = createContext({
   isExecuting: kclManager.isExecuting,
   errors: kclManager.kclErrors,
   logs: kclManager.logs,
+  wasmInitFailed: kclManager.wasmInitFailed,
 })
 
 export function useKclContext() {
@@ -326,6 +351,7 @@ export function KclContextProvider({
   const [isExecuting, setIsExecuting] = useState(false)
   const [errors, setErrors] = useState<KCLError[]>([])
   const [logs, setLogs] = useState<string[]>([])
+  const [wasmInitFailed, setWasmInitFailed] = useState(false)
 
   useEffect(() => {
     kclManager.registerCallBacks({
@@ -335,6 +361,7 @@ export function KclContextProvider({
       setLogs,
       setKclErrors: setErrors,
       setIsExecuting,
+      setWasmInitFailed,
     })
   }, [])
   return (
@@ -346,6 +373,7 @@ export function KclContextProvider({
         isExecuting,
         errors,
         logs,
+        wasmInitFailed,
       }}
     >
       {children}