MiCollab Client 7.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is Mitel Networks Corp. The program lies within Communication Tools, more precisely Texting & Video calls. We recommend checking the downloaded files with any free antivirus.
From the developer:
MiCollab provides customers that have installed Mitel phone systems with a single access point for all their business communication and collaboration needs. Employees can check the availability of colleagues, make phone calls, search the corporate directory, IM contacts, check corporate voice mail, change status, place video calls, and more, directly from their desktops.
You may want to check out more software for Mac, such as eM Client, Parallels Client or ArraySync Client, which might be similar to MiCollab Client.