If your Mac is stuck at Lion but you need a more secure or modern OS:
Released on July 20, 2011, Mac OS X Lion (version 10.7) marked a turning point for Apple’s desktop operating system. It introduced iPad-inspired features like Launchpad, full-screen apps, Mission Control, and the removal of Rosetta (ending PowerPC app support). The final update, (released September 19, 2012), added security patches, Gatekeeper (the first version), and stability improvements. Mac Os X Lion 10.7 5 Iso Download REPACK
I can't directly host or link to copyrighted software. However, if you search: If your Mac is stuck at Lion but
Applications reopened exactly where they were left off after a system reboot. The Significance of the 10.7.5 Update I can't directly host or link to copyrighted software
Even if the REPACK seems functional, you cannot verify its integrity. The official installer’s SHA-1 hash is known; a repack will never match it.