| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:33.65 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 100m Breaststroke | 1:37.47 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Butterfly | 2:02.27 | VAC - 36th Roy Jacobson Inv. | 2025-12-05 |
| 100m Freestyle | 1:18.81 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m Backstroke | 3:23.39 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m Breaststroke | 3:28.46 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m Freestyle | 2:54.15 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 200m IM | 3:36.55 | VAC - 36th Roy Jacobson Inv. | 2025-12-05 |
| 400m Freestyle | 6:41.20 | VAC - 36th Roy Jacobson Inv. | 2025-12-05 |
| 50m Breaststroke | 44.80 | 2026 Steve Kingston Memorial | 2026-03-06 |
| 50m Freestyle | 38.67 | VAC - 36th Roy Jacobson Inv. | 2025-12-05 |
MacDonald, William's top personal bests include 100m Backstroke (1:33.65), 100m Breaststroke (1:37.47), 100m Butterfly (2:02.27), 100m Freestyle (1:18.81), 200m Backstroke (3:23.39).
MacDonald, William swims for Vaughan Aquatic Club.
MacDonald, William has competed in 9 meets.