If you have an older version of VirtualRPC you may find that the Product installers report an error message and then close without installing the VirtualRPC. There are two solutions for this problem:

The article explains how you can perform a manual installation of VirtualRPC.

or

A paid for upgrade is available from VirtualAcorn which fixes this problem. This upgrade includes a number of improvements and bug fixes and is recommended for users who are running Mac OS X Mavericks, Yosemite or later.

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