Mac processes executable has incorrect value

[imilchev]

Describe the bug
The executable field for a MacOS process has incorrect value. For linux the value of executable holds just the executable name. For MacOS processes, the same field holds the full path to the executable.

MacOS:

Linux:

To Reproduce
Steps to reproduce the behavior:

1. Open cnspec shell
2. Run processes{executable}
3. Note the mistake

Expected behavior
The value of executable should behave the same as for Linux. It should contain just the executable name, not the full path