diff --git a/v2/internal/frontend/desktop/darwin/clipboard.go b/v2/internal/frontend/desktop/darwin/clipboard.go
index c40ba877175..ffeaa217541 100644
--- a/v2/internal/frontend/desktop/darwin/clipboard.go
+++ b/v2/internal/frontend/desktop/darwin/clipboard.go
@@ -3,11 +3,25 @@
 package darwin
 
 import (
+	"os"
 	"os/exec"
 )
 
+// ensureUTF8Env returns the current environment with LANG set to en_US.UTF-8
+// if it is not already set. This is needed because packaged macOS apps do not
+// inherit the terminal's LANG variable, causing pbpaste/pbcopy to default to
+// an ASCII-compatible encoding that mangles non-ASCII text.
+func ensureUTF8Env() []string {
+	env := os.Environ()
+	if _, ok := os.LookupEnv("LANG"); !ok {
+		env = append(env, "LANG=en_US.UTF-8")
+	}
+	return env
+}
+
 func (f *Frontend) ClipboardGetText() (string, error) {
 	pasteCmd := exec.Command("pbpaste")
+	pasteCmd.Env = ensureUTF8Env()
 	out, err := pasteCmd.Output()
 	if err != nil {
 		return "", err
@@ -17,6 +31,7 @@ func (f *Frontend) ClipboardGetText() (string, error) {
 
 func (f *Frontend) ClipboardSetText(text string) error {
 	copyCmd := exec.Command("pbcopy")
+	copyCmd.Env = ensureUTF8Env()
 	in, err := copyCmd.StdinPipe()
 	if err != nil {
 		return err