Scopebox turns any Mac notebook either in a preview monitor, a Vektorscop or disk recorder and live shows luminance and RGB
histograms and luma / chroma zebras to. In addition, it offers a focus helper, Waveform Display, RGB / YUV Parade display and VU meters. The input is via any device supported by QuickTime, such as DV, HDV, Analogue, SDI, or HD-SDI Capure-Karten/Boxen. The free upgrade to version 2.1 brings several improvements, including improved HDV / QuickTime audio performance and support for playback. The SD version will cost $ 400, the HD version $ 700. Here is a very positive 
Review of version 2.0 of Scopebox.
