Sculptor using manufactured materials and found objects to create floor- and wall-based sculptures. Was born in Oban, Argyll, and studied sculpture at Glasgow School of Art from 1981–6. In 1987 she worked at the Artists’ Collective Studio in Budapest, Hungary. As well as showing in Hungary she had a solo exhibition at Collective Gallery, Edinburgh, 1986, and at Glasgow Print Studio in 1989. She was a co-founder and director of Glasgow Sculpture Studios and in 1989–90 was featured in Scottish Art since 1900 at Scottish National Gallery of Modern Art, which holds her metal and elastic bands sculpture: Objects 8, 9, 10 in a Row. Mackenna’s creations direct the viewer’s attention to the character of the materials she employed. From 1996 Mackenna collaborated with the Dutch artist Edwin Janssen, in 1998 contributing Of All Places, an Internet-based work, to artranspennine98.