Paradox is a fundamental element in Macchi's way of conceiving each work: systems that contradict one another, impossible symmetries, structures that contain the seed of their own destruction.

Amongst the artstist’s solo exhibitions, important highlights are ‘Perspectiva’, CA2M Centro Cultural de Arte Dos de Mayo, Madrid (2017); MALBA Museo de Arte Latino-Americana, Buenos Aires (2016); ‘Espectrum’, Le 19 CRAC Centre régional d'art contemporain, Montbéliard (2015); ‘Music Stands Still’, SMAK Stedelijk Museum voor Actuele Kunst, Ghent (2011); and ‘Anatomía de la melancolía’, Santander Cultural, Porto Alegre, as part of the Bienal do Mercosul (2007). The latter was subsequently shown at the Museo Blanton, Austin (2007) and at the CGAC Centro Gallego de Arte Contemporáneo, Santiago de Compostela (2008).

Recent solo exhibitions include: ‘Lampo’, NC Arte, Bogota (2015); ‘Prestidigitador’, MUAC Museo Universitario Arte Contemporáneo, Mexico City (2014); ‘Container’, MAMBA Museo de Arte Moderno, Buenos Aires (2013) and Kunstmuseum Luzern, Lucerne (2013); ‘Last minute’, in collaboration with Edgardo Rudnitzky, Pinacoteca do Estado, São Paulo (2009); ‘Doppelgänger’, La casa encendida, Madrid (2005).

He has participated in the art biennales in of Liverpool (2012); Sydney (2012) ; Lyon (2011) ; Istanbul (2003 and 2011) ; Auckland (2010) ; New Orleans (2008); Yokohama (2008) ; Porto Alegre (2003 and 2007); São Paulo (2004 and 2006) ; Venice (2005) ; Prague (2005) ; Fortaleza (2002) and Havana (2000) . He represented Argentina at the Venice Biennale in 2005.

His work is part of collections such as: Tate Collection, England; MoMA - Museum of Modern Art, USA; MUSAC - Museu de Arte Contemporáneo de Castilla y León, Spain; CGAC - Centro Galego de Arte Contemporânea, Santiago de Compostela, Spain; MAMBA - Museo de Arte Moderna de Buenos Aires, Argentina; MUHKA - Museum of Modern Art Antwerp, Belgium; Museo del Barrio, USA; SMAK - Municipal Museum of Contemporary Art, Belgium; MALI - Museo de Lima, Peru; MAMAC - Musée d’Art Moderne et d’Art Contemporain, France; Fundación Arco, Spain.