Photoshop CS4 for Mac was built during Apple's transition from PowerPC to Intel processors. Modern Macs use Apple Silicon (M1, M2, M3 chips) which cannot execute this legacy code natively.
Apple’s modern security protocols often block the installation of unsigned, decades-old software, making the "crack" files found in torrents unusable. The Risks of Using Torrents for Creative Software adobe photoshop cs4 for mac os x torrent full
Even if you manage to avoid malware, using a pirated version of CS4 is largely impractical today: Adobe Photoshop CS4 Extended | Community 17 Mar 2022 — Photoshop CS4 for Mac was built during Apple's