You can download Table Caller 1.1 for Mac from our application library for free. The application lies within Theming Tools, more precisely Multiple Desktops.
From the developer:
Table Caller helps when you have large gatherings and want to announce which table of people can line up (for food, etc.) without confusion. Table Caller can call tables in order or at random. Table Caller supports up to ninety-nine tables.
You may want to check out more Mac applications, such as Table Rock Sound, Functional Table Reader or Periodic Table 5, which might be similar to Table Caller.