A "portable" application is a version of software designed to run without a formal installation process. Typically, these versions are stored on external drives (like a USB stick) and do not leave behind preference files or registry entries on the host computer.
While many users look for a "portable" version of Adobe Photoshop for Mac to use on the go without a full installation, . adobe photoshop mac portable
This is the closest thing to a "portable" Photoshop. It’s a free, web-based editor that looks and feels exactly like Photoshop. It even supports .PSD files. A "portable" application is a version of software