Embedding Custom Fonts OTF, TTF

I’ve been trying to add custom fonts for the past day and whatever I do, nothing seems to work.

I’ve added both .otf and (converted) .ttf files. Added these methods to my custom LookAndFeel class:

    MonosynthLookAndFeel()
	{
		defaultOutlineCol = Colours::darkgrey;
		defaultFillCol = Colours::black;
		setColour(ToggleButton::tickColourId, darkThumb);

		static Typeface::Ptr customTypeface = Typeface::createSystemTypefaceFor(BinaryData::NowBlack_ttf, BinaryData::NowBlack_ttfSize);
		setDefaultSansSerifTypeface(customTypeface);
	}

    Typeface::Ptr getTypefaceForFont(const Font& f) override
	{
		static Typeface::Ptr myFont = Typeface::createSystemTypefaceFor(BinaryData::NowBlack_ttf,
			BinaryData::NowBlack_ttfSize);
		return myFont;
	}

…but to no avail. Is there something I’m overlooking? Haven’t tested it on Mac, only on Windows.