Here is a category for NSTextView that allows you to easily size a text view to fit its contents:

@interface NSTextView (SizeToFit)

• (NSSize)minSizeForContent;

@end

@implementation NSTextView (SizeToFit)

• (NSSize)minSizeForContent { NSLayoutManager *layoutManager = [self layoutManager]; NSTextContainer *textContainer = [self textContainer];

  [layoutManager boundingRectForGlyphRange:NSMakeRange(0, [layoutManager numberOfGlyphs]) inTextContainer:textContainer]; // dummy call to force layout NSRect usedRect = [layoutManager usedRectForTextContainer:textContainer]; NSSize inset = [self textContainerInset];

  return NSInsetRect(usedRect, -inset.width * 2, -inset.height * 2).size; }

@end