diff --git a/main.go b/main.go
index 2be9aa2b..151a5995 100644
--- a/main.go
+++ b/main.go
@@ -43,6 +43,8 @@ var (
 	reclaimEvery5Seconds = false
 	// Current working directory of process
 	cwd = CwdOrPanic()
+	// workerReady becomes true when it is able to call queue.claimWork for the first time
+	workerReady = false
 	// Whether we are running under the aws provisioner
 	configureForAWS bool
 	// Whether we are running in GCP
@@ -390,7 +392,6 @@ func RunWorker() (exitCode ExitCode) {
 	if host, err := sysinfo.Host(); err == nil {
 		logEvent("instanceBoot", nil, host.Info().BootTime)
 	}
-	logEvent("workerReady", nil, time.Now())
 
 	err = setupExposer()
 	if err != nil {
@@ -541,6 +542,11 @@ func RunWorker() (exitCode ExitCode) {
 
 // ClaimWork queries the Queue to find a task.
 func ClaimWork() *TaskRun {
+	// only log workerReady the first time queue.claimWork is called
+	if !workerReady {
+		workerReady = true
+		logEvent("workerReady", nil, time.Now())
+	}
 	req := &tcqueue.ClaimWorkRequest{
 		Tasks:       1,
 		WorkerGroup: config.WorkerGroup,
diff --git a/uptime/update_darwin.go b/uptime/update_darwin.go
new file mode 100644
index 00000000..2084c457
--- /dev/null
+++ b/uptime/update_darwin.go
@@ -0,0 +1,14 @@
+package main
+
+import (
+	"log"
+	"syscall"
+)
+
+func main() {
+	uptime, err := syscall.Sysctl("kern.boottime")
+	if err != nil {
+		log.Fatalf("%v", err)
+	}
+	log.Printf("Uptime: %v", uptime)
+}
diff --git a/worker_types/gwci-linux/screenshot.xwd b/worker_types/gwci-linux/screenshot.xwd
new file mode 100644
index 00000000..4e9e066c
Binary files /dev/null and b/worker_types/gwci-linux/screenshot.xwd differ