A mounting apparatus is provided for mounting a slide rail to a fixed structure includes a mounting bracket fixed to the slide rail, an actuating member slidably attached to the mounting bracket, at least one blocking member extending from the actuating member, a locking member deformably attached to the mounting bracket, and a resilient member connecting between the mounting bracket and the actuating member. The actuating member is slidable between a first position to maintain securing of the mounting bracket to the support, and a second position to allow release the mounting bracket from the support. The locking member comprises at least one first abutting end releasably abutting the blocking member to maintain the actuating member in the first position, and at least one second abutting end releasably abutting the blocking member to maintain the actuating member in the second position. The resilient member biases the actuating member to the first portion.