Photoshop 7.0 was the first version to support Mac OS X and the last to support Windows 98/Me.
If you are looking for a more modern, free alternative, I can suggest some great open-source software. How to unlock layers in Adobe Photoshop. Adobe Photoshop 7.0 Download With Serial Key Softonic
If you need a free, lightweight photo editor, there are modern alternatives that do not require searching for old serial keys: Photoshop 7
What is your ? (e.g., basic photo retouching, digital painting, graphic design) lightweight photo editor
Adobe Photoshop 7.0, released in March 2002, remains a nostalgic and occasionally functional tool for users with older hardware or specific legacy project needs