diff --git a/src/_macosx.m b/src/_macosx.m
index fe93193eb053..77a04e38410a 100755
--- a/src/_macosx.m
+++ b/src/_macosx.m
@@ -80,6 +80,9 @@ static int wait_for_stdin() {
// continuously run an event loop until the stdin_received flag is set to exit
while (!stdin_received && !stdin_sigint) {
+ // This loop is similar to the main event loop and flush_events which have
+ // Py_[BEGIN|END]_ALLOW_THREADS surrounding the loop.
+ // This should not be necessary here because PyOS_InputHook releases the GIL for us.
while (true) {
NSEvent *event = [NSApp nextEventMatchingMask: NSEventMaskAny
untilDate: [NSDate distantPast]
@@ -383,6 +386,9 @@ static CGFloat _get_device_scale(CGContextRef cr)
// to process, breaking out of the loop when no events remain and
// displaying the canvas if needed.
NSEvent *event;
+
+ Py_BEGIN_ALLOW_THREADS
+
while (true) {
event = [NSApp nextEventMatchingMask: NSEventMaskAny
untilDate: [NSDate distantPast]
@@ -393,6 +399,9 @@ static CGFloat _get_device_scale(CGContextRef cr)
}
[NSApp sendEvent:event];
}
+
+ Py_END_ALLOW_THREADS
+
[self->view displayIfNeeded];
Py_RETURN_NONE;
}
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