In his first match back for the Sixers in three seasons, Smith hit 36 off 27 balls before the Scorchers’ bowlers claimed a tight grip over the SCG contest.
Smith’s opening partner Josh Philippe hit 57 off 48 to anchor the innings, though he managed only three boundaries and struggled to regularly find the middle of the bat.
Andrew Tye was economical in his 0-22 for the Scorchers, while Jason Behrendorff claimed 1-30.
It was Smith who provided the highlights for the hosts.
After going scoreless off his first five balls, he went on to strike four boundaries and two sixes.
The pick of his shots was was a slog sweep for six off Ashton Agar, while he also played a superb back-foot drive off David Payne.
Another six came when he hooked Behrendorff over backward-square leg, before he hit the left-armer to the same boundary again for four off the next ball.
Smith is on a sizeable marketing deal from Cricket Australia and Cricket NSW to play in the Sixers’ final four regular-season games.
He fell whenÂ Steve Eskinazi took a diving catch at cover to remove him off Peter Hatzoglou (2-27), before Philippe battled his way through to the end of the innings.
The Sixers opted to play Nathan Lyon in the match, leaving out Australia’s newest Test squad member Todd Murphy.