A mounting apparatus for securing electronic devices is disclosed. The mounting apparatus comprises a base; two supports secured to the base; a positioning member located in each of the two supports, wherein the positioning member and each of the two supports are configured to move relative to each other along an axis parallel to a surface of the base, and the positioning member has a tooth-faced side with a plurality of first teeth; a securing member having a plurality of second teeth, wherein the securing member is adapted to engage with the positioning member by meshing the plurality of second teeth and the plurality of first teeth, and the securing member is slidable towards the base along the position member; and two resilient members located in each of the two supports, wherein the two resilient members maintains engagement between the plurality of first teeth and the plurality of second teeth.