diff --git a/beszel/internal/agent/sensors.go b/beszel/internal/agent/sensors.go
index ca7370c..f727bde 100644
--- a/beszel/internal/agent/sensors.go
+++ b/beszel/internal/agent/sensors.go
@@ -6,8 +6,10 @@ import (
 	"fmt"
 	"log/slog"
 	"path"
+	"runtime"
 	"strconv"
 	"strings"
+	"unicode/utf8"
 
 	"github.com/shirou/gopsutil/v4/common"
 	"github.com/shirou/gopsutil/v4/sensors"
@@ -103,6 +105,11 @@ func (a *Agent) updateTemperatures(systemStats *system.Stats) {
 
 	systemStats.Temperatures = make(map[string]float64, len(temps))
 	for i, sensor := range temps {
+		// check for malformed strings on darwin (gopsutil/issues/1832)
+		if runtime.GOOS == "darwin" && !utf8.ValidString(sensor.SensorKey) {
+			continue
+		}
+
 		// scale temperature
 		if sensor.Temperature != 0 && sensor.Temperature < 1 {
 			sensor.Temperature = scaleTemperature(sensor.Temperature)