Up-level applications to a new OS

A method for migrating an application from a source computing environment having a source Operating System (OS) to a target computing environment having a target OS, the source computing environment being separate from the target computing environment, the method comprising:

• discovering applications, resources, or both, on the source computing environment;
• preparing a migration computing environment having the target OS based on the discovered applications, resources or both;
• instantiating a virtual migration sandbox in the migration computing environment;
• connecting the migration computing environment to the source computing environment;
• instantiating the application within the virtual migration sandbox;
• capturing in-process and out-of-process calls made by the application during execution, the in-process calls running in a same process as the application, the out-of-process calls running in different execution threads than the application, wherein said capturing comprises monitoring the in-process and out-of-process calls;
• determining, based on said capturing of the in-process and out-of-process calls, if a particular resource required for successful execution of the application is unavailable in the migration computing environment;
• redirecting one or more of the in-process and out-of-process calls to a version of the particular resource located in the source computing environment to facilitate said successful execution of the application;
• and
• updating the migration computing environment based on the captured in-process and out-of-process calls to copy or modify resources in the migration computing environment as required to allow for successful execution of the application in the migration computing environment, said updating comprising copying the particular resource into the migration computing environment.