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University Technology Services



A MacID is a unique, alphanumeric identifier provided to all McMaster community members to access university systems, resources and applications. Additional permissions may be required for some services.

Your MacID is not your employee or student number.

If you have any questions, or are unable to resolve your issue, support can be received via the Service Desk

Service Desk

Who can use it?

Students, alumni, applicants, faculty members, staff, POIs and retirees.

How much does it cost?

This service is free.

How to get it

Users automatically receive a MacID when their relationship to the university has been identified.

Service availability


Activating your MacID

  • Your MacID can be activated at
  • Click on Need help with your MacID (above the LOGIN button)
  • Select the option “I Want to Activate My MacID” and follow the prompts

MacID is used to authenticate services, such as:

  • Mosaic
  • MacDrive
  • Microsoft 365
  • Email
  • LibAccess
  • MacSecure
  • MacVote
  • Virtual Private Network (VPN)
  • Avenue to Learn
  • Student Print Services

Frequently Asked Questions

If you have any issues or questions regarding your MacID, visit our Need Help? – Contact Us page for assistance. Live chat, located in the bottom right-hand corner, is the quickest and easiest way to receive assistance.

An external email is mandatory for activation. When you activate your MacID, a temporary password will be sent to your external email account.


Individuals who are not McMaster employees but require access to Mosaic as part of their job function are considered to be Persons of Interest. The Person of Interest designation grants a MacID and an email account on the McMaster server. To request a POI account, supervisors are to submit the online form by logging into  selecting Accounts and Access then  POI Request form. A personal ID number and barcode will be provided to activate your account. You may activate your MacID immediately.



Employees have the ability to request Guest MacID accounts for Wi-Fi access as needed.

If you are a guest, please make arrangements with your McMaster contact for a guest account.

To request a Guest Account, see the instructions here: Request Guest Wi-Fi access

Note: additional authorization may be required for some system access