diff --git a/darwin/box.m b/darwin/box.m
index bcc5071c..8661d902 100644
--- a/darwin/box.m
+++ b/darwin/box.m
@@ -266,7 +266,7 @@ struct uiBox {
 	if (bc.stretchy)
 		priority = NSLayoutPriorityDefaultLow;
 	else
-		// TODO will default high work?
+		// LONGTERM will default high work?
 		priority = NSLayoutPriorityRequired;
 	uiDarwinControlSetHuggingPriority(uiDarwinControl(bc.c), priority, self->primaryOrientation);
 	// make sure controls don't hug their secondary direction so they fill the width of the view
@@ -398,7 +398,8 @@ uiDarwinControlDefaultSetHuggingPriority(uiBox, view)
 
 void uiBoxAppend(uiBox *b, uiControl *c, int stretchy)
 {
-	// TODO on other platforms
+	// LONGTERM on other platforms
+	// or at leat allow this and implicitly turn it into a spacer
 	if (c == NULL)
 		userbug("You cannot add NULL to a uiBox.");
 	[b->view append:c stretchy:stretchy];
diff --git a/darwin/checkbox.m b/darwin/checkbox.m
index cdacf419..dd1ce093 100644
--- a/darwin/checkbox.m
+++ b/darwin/checkbox.m
@@ -110,11 +110,12 @@ uiCheckbox *uiNewCheckbox(const char *text)
 
 	uiDarwinNewControl(uiCheckbox, c);
 
-	// TODO bezel style? transparent?
 	c->button = [[NSButton alloc] initWithFrame:NSZeroRect];
 	[c->button setTitle:toNSString(text)];
 	[c->button setButtonType:NSSwitchButton];
+	// doesn't seem to have an associated bezel style
 	[c->button setBordered:NO];
+	[c->button setTransparent:NO];
 	uiDarwinSetControlFont(c->button, NSRegularControlSize);
 
 	if (checkboxDelegate == nil) {
diff --git a/darwin/colorbutton.m b/darwin/colorbutton.m
index 26100a0d..28a604af 100644
--- a/darwin/colorbutton.m
+++ b/darwin/colorbutton.m
@@ -6,6 +6,7 @@
 @interface colorButton : NSColorWell {
 	uiColorButton *libui_b;
 	BOOL libui_changing;
+	BOOL libui_setting;
 }
 - (id)initWithFrame:(NSRect)frame libuiColorButton:(uiColorButton *)b;
 - (void)deactivateOnClose:(NSNotification *)note;
@@ -77,7 +78,8 @@ struct uiColorButton {
 
 	[super setColor:color];
 	// this is called by NSColorWell's init, so we have to guard
-	if (b != nil)
+	// also don't signal during a programmatic change
+	if (b != nil && !self->libui_setting)
 		(*(b->onChanged))(b, b->onChangedData);
 }
 
@@ -98,8 +100,9 @@ struct uiColorButton {
 
 - (void)libuiSetColor:(double)r g:(double)g b:(double)b a:(double)a
 {
-	// TODO does this set the panel color? does it send a signal?
+	self->libui_setting = YES;
 	[self setColor:[NSColor colorWithSRGBRed:r green:g blue:b alpha:a]];
+	self->libui_setting = NO;
 }
 
 // NSColorWell has no intrinsic size by default; give it at least the height of the equivalent button's
diff --git a/darwin/draw.m b/darwin/draw.m
index 68d02bc0..262ad3e2 100644
--- a/darwin/draw.m
+++ b/darwin/draw.m
@@ -197,7 +197,7 @@ void uiDrawStroke(uiDrawContext *c, uiDrawPath *path, uiDrawBrush *b, uiDrawStro
 // for a solid fill, we can merely have Core Graphics fill directly
 static void fillSolid(CGContextRef ctxt, uiDrawPath *p, uiDrawBrush *b)
 {
-	// TODO this uses DeviceRGB; switch to sRGB?
+	// TODO this uses DeviceRGB; switch to sRGB
 	CGContextSetRGBFillColor(ctxt, b->R, b->G, b->B, b->A);
 	switch (p->fillMode) {
 	case uiDrawFillModeWinding:
diff --git a/darwin/editablecombo.m b/darwin/editablecombo.m
index 67259521..c676c562 100644
--- a/darwin/editablecombo.m
+++ b/darwin/editablecombo.m
@@ -126,7 +126,7 @@ void uiEditableComboboxSetText(uiEditableCombobox *c, const char *text)
 }
 
 #if 0
-// TODO
+// LONGTERM
 void uiEditableComboboxSetSelected(uiEditableCombobox *c, intmax_t n)
 {
 	if (c->editable) {
diff --git a/darwin/group.m b/darwin/group.m
index 4baca240..8dba62c3 100644
--- a/darwin/group.m
+++ b/darwin/group.m
@@ -1,8 +1,6 @@
 // 14 august 2015
 #import "uipriv_darwin.h"
 
-// TODO just outright ban passing NULL to any parents? that still won't fix the initial case
-
 struct uiGroup {
 	uiDarwinControl c;
 	NSBox *box;
@@ -164,7 +162,6 @@ void uiGroupSetMargined(uiGroup *g, int margined)
 {
 	g->margined = margined;
 	singleChildConstraintsSetMargined(&(g->constraints), g->margined);
-	// TODO issue a relayout command?
 }
 
 uiGroup *uiNewGroup(const char *title)
diff --git a/darwin/main.m b/darwin/main.m
index dd7f2d60..97821201 100644
--- a/darwin/main.m
+++ b/darwin/main.m
@@ -189,7 +189,6 @@ int uiMainStep(int wait)
 	}
 }
 
-// TODO make this delayed
 void uiQuit(void)
 {
 	canQuit = YES;
@@ -197,7 +196,7 @@ void uiQuit(void)
 }
 
 // thanks to mikeash in irc.freenode.net/#macdev for suggesting the use of Grand Central Dispatch for this
-// TODO will dispatch_get_main_queue() break after _CFRunLoopSetCurrent()?
+// LONGTERM will dispatch_get_main_queue() break after _CFRunLoopSetCurrent()?
 void uiQueueMain(void (*f)(void *data), void *data)
 {
 	// dispatch_get_main_queue() is a serial queue so it will not execute multiple uiQueueMain() functions concurrently