On his return to civilian life, Macky resumed his legal career but maintained an interest in the military by joining the
Territorial Force (TF). Previously a sole practitioner, he went into partnership with another solicitor in 1920. Much of the firm's work was in property conveyancing work and in 1928, Macky, having purchased his partner's share of the practice, merged his firm into what later became
Russell McVeagh. Many of the partners of the firm, like Macky, were officers in the TF. Macky was promoted to major in the TF in 1926 and to colonel in 1931, at which time he was in command of the Auckland Regiment. Six years later, he was appointed commander of the 1st New Zealand Infantry Brigade.
Four Colonel's Revolt In 1937, the TF was the subject of reforms carried out by Major General
John Duigan, the Chief of General Staff of the New Zealand Military Forces, to improve efficiencies in the organisation. Several regiments were disbanded and were reconstituted as battalions while a number of senior officers were placed in retirement. The morale of the TF declined as those senior officers who were left raised concerns, disregarded by Duigan, over the state of the army. Macky was one of four colonels in the TF who publicly protested the reforms in what became known as the ''Four Colonels' Revolt''. This was a breach of military regulations, which prohibited military personnel from communicating with journalists unless they had permission to do so. Instead of a
court-martial, which he feared would generate public sympathy for the colonels, Duigan placed all four officers on the retired list as punishment. The revolt did result in greater public awareness of the poor state of New Zealand's military, but little was done to rectify the situation. ==Second World War==