For the 2015–16 NBL season, McDonald joined the New Zealand Breakers.[13][14] In his debut for the Breakers, he scored seven points on 2-of-11 shooting.[15][16] He lost his spot in the line-up for the playoffs after the coaching staff preferred development player Shea Ili.[17] The Breakers made the grand final series, where they lost to the Perth Wildcats.[18] In 22 games, McDonald averaged 1.3 points in 6.2 minutes per game.[19]
In 2011, McDonald helped the Spectres win the SEABL championship while earning grand final MVP honours.[22] In 2013, he earned SEABL co-MVP honours alongside Sandringham Sabres centre John Pichon.[23]
In 2014, McDonald helped the Spectres win the SEABL East Conference title.[24] They went on to lose to the Mount Gambier Pioneers in the SEABL grand final.[25]
In 2016, McDonald helped the Spectres reach the East Conference grand final, where they were defeated 76–64 by the Bendigo Braves.[26][27] He was subsequently named in the All-SEABL Team for the sixth straight season.[28][29][30][31][32][33]
In 2017, McDonald was named the recipient of the SEABL's Golden Hands award[34] and became the SEABL's all-time assists leader, overtaking Ben Harvey with 1,959.[35][36]
In 2018, McDonald led the Spectres to the SEABL Grand Final, where they lost 72–58 to the Hobart Chargers.[37]
In 2019, McDonald helped the Spectres return to the grand final, this time in the NBL1,[38] where he had 12 points and 10 assists in a 99–90 win over the Bendigo Braves to claim his second championship with Nunawading.[39][40] He announced his retirement following the grand final.[41]
McDonald is a physical education teacher and was the basketball coach at Maribyrnong College in Melbourne before signing with the New Zealand Breakers in 2015.[13]
^Walsh, Scott (14 February 2003). "Hornets bid for NBL basketballer". MailTimes.com.au. Archived from the original on 19 June 2015. Retrieved 19 June 2015. Star forward Shane McDonald will also see out the season while he finishes high school and Ben Dumesny will play on.
^Lawson, Dean (24 February 2004). "Hornets launch search for Brack replacement". MailTimes.com.au. Archived from the original on 19 June 2015. Retrieved 19 June 2015. National star Aaron Bruce will play for Horsham for half the season and classy Shane McDonald for the home-and-away year before they both pursue basketball careers overseas.
^"BASKETBALL DUO TIE THE KNOT". laceylowdown.com. 24 March 2016. Retrieved 2 February 2023. Ili made a strong impression on the Breakers coaching staff during the recent campaign and despite being a development player was preferred to the more experienced Shane McDonald in all five play-off games.