Mac Sinise

McCanna Anthony "Mac" Sinise (November 1990 – January 5, 2024) was an American composer, drummer, and occasional actor — and the son of Gary Sinise (ET). Diagnosed with chordoma, a rare spinal cancer, in 2018, he kept writing and recording through a five-and-a-half-year illness, finishing the album Resurrection & Revival in the week he died (TheWrap). His father has since carried the catalog forward, completing the unfinished "Quasi Love" and expanding Mac's work across foundation albums (Movieguide).[edit]

Born McCanna Anthony Sinise in November 1990 to Gary and Moira Sinise; raised with sisters Sophie and Ella in an entertainment household. Gravitated early to drums, practicing for hours, then to composition. In his late teens and twenties he played the Los Angeles scene as a session drummer and collaborator while writing his own material. In 2018 — the same year his mother was diagnosed with stage 3 breast cancer — he received the chordoma diagnosis (Managed Healthcare Executive). His father stepped back from acting in 2019 to help care for him.[edit]

Mac released music independently to Spotify and YouTube, holding a modest, loyal listenership. The defining chapter came at the end: he completed Resurrection & Revival the week he died (TheWrap). After his death Gary found the unfinished "Quasi Love" on Mac's computer, had Dan Myers complete it, and recorded it at Ocean Way Studios on July 29, 2024, with Mac's photos around the room. The foundation has since built the catalog into multiple albums, most recently a third (Movieguide). A brief acting credit also exists (IMDb).[edit]

Private studio musician in life; beloved-son memorial figure after death. Coverage centers on his father's grief, the family's caregiving years, and the music as emotional artifact. The work — not celebrity — is the public record.[edit]

iFANN-only numbers, read from live data: YouTube: 18,600 subscribers, 1,307,928 views (fetched 2026-10-18). Last.fm returned no listener data for this entry (queried 2026-10-13). Popularity rank: #39,666 overall, #29,520 by type (ranked 2026-10-19). iFANN's Global Fame Engine assigns no placement in the Global Top 1,000 or any scope-specific list. No formal fandom exists; his audience is listeners who found the music through the family's story.[edit]

"Mac" came from his middle name, McCanna, a family name. Gary's CSI: NY character Mac Taylor was partly named for him. He died at 3:25 p.m. on January 5, 2024, the week Resurrection & Revival went to press (TheWrap). His Spotify page still draws thousands of monthly listeners.[edit]

Son of Gary and Moira Sinise; brother of Sophie (eldest) and Ella (youngest). The family closed ranks through the illness — Gary left acting to caregive, and all were with Mac at the end (ET). Never married; no children. The foundation tribute page carries the family's memorial (Gary Sinise Foundation).[edit]

Father Gary Sinise (Forrest Gump, Apollo 13, CSI: NY); mother Moira; sisters Sophie and Ella. Collaborator Dan Myers, who completed "Quasi Love." The Lt. Dan Band musicians appear on the legacy albums (Movieguide).[edit]

No confirmed romantic relationship is documented. He never married and had no children. His final years centered on family and music.[edit]

McCanna Anthony Sinise spent his final days in Los Angeles, California, surrounded by family as he navigated a prolonged and aggressive battle with chordoma, a rare spinal cancer. On January 5, 2024, the composer and drummer passed away at the age of 33, though some immediate family statements initially referred to him as 34 due to the proximity of his birthday. His father, actor Gary Sinise, confirmed the cause was the specific malignancy that had required Mac to undergo treatment with approximately 25 different drugs, noting there was no standard protocol available for such a diagnosis. The news prompted an outpouring of grief from the entertainment community and the Gary Sinise Foundation, which issued a tribute describing Mac as a man of faith, humility, compassion, and wit.

Tributes highlighted his role within the foundation's circle, and his musical catalog saw renewed attention as fans discovered his emotional depth. Gary Sinise spoke about finding healing in his son's work, calling the unreleased material a "treasure chest" of signs left behind. While the specific details of a funeral or burial service remain private, memorial efforts have evolved into ongoing charitable and artistic events. The "Graceful Warrior" benefit concert is scheduled for August 2026 at the Skylight Music Theatre in Milwaukee to honor his life. Posthumous releases continue to manage his estate, including the album Resurrection & Revival Part Three, with proceeds directed toward the foundation's mission rather than retained by the family.[edit]

No estate value was ever published; the $1 million figure is unsourced. On record: modest career earnings plus posthumous streaming royalties, with album proceeds directed to the Gary Sinise Foundation (Movieguide).[edit]