Install Top: Unity Portable

Unity relies on Microsoft Visual C++ Redistributables. If the guest computer is missing these, Unity will fail to launch. Keep a copy of the vc_redist.x64.exe installer in a Prerequisites folder on your USB drive so you can install it quickly if a guest machine throws an error.

Unity looks for specific environment variables to determine where to store cache and configuration data. By manipulating these, the user can force Unity to write configuration files within the portable directory, rather than the system AppData folder. unity portable install top

"Unity is already running" error on a new PC. Fix: Delete U:\Unity\Cache\Lock file and U:\Projects\MyGame\Library\ArtifactDB . Unity locks artifacts by machine ID. Unity relies on Microsoft Visual C++ Redistributables

Carry your entire engine, IDE, and project assets in your pocket. Unity looks for specific environment variables to determine

Create a batch file ( run_unity.bat for Windows) or a shell script ( run_unity.sh for macOS) in the root of your portable drive. Populate it with the following startup execution command: