Testing of small groups of iMacs

Testing of small groups of iMacs


Almost ten years of being a Computer Teacher in the 3 international schools that I’ve worked with, it was always a challenge to have school management to get on board with purchasing a remote management software to manage a platoon of computers in the classroom. I remember having to plead school IT managers, Director, Principals and Chairman on understanding the importance of assisting teachers like myself to reduce distraction and enabling us to deliver our teaching, so that our students can learn more during our sessions.

Understandably, it was a difficult battle when ICT has high price point, in everything….. (isn’t it, School Leaders?). However, I just wish that School’s can be innovative with their technology policies, in terms of advancement and seeking creative ways to sustain or getting the community to take lead in sponsoring a soon-to-be Core Subject. Most educators or providers had their heart and mind on traditional mediums, like paper and pen.


Super grateful that while casually browsing the internet, I saw how people argued that the latest MacOS Ventura will not be supporting a lot of old Mac Devices and there amongst the craziest exchanges of comments, there was an angel sharing an alternative for us to manage old Macs with… ehhem… unofficial or grey area (according to some users statement in Quora) latest MacOS through OpenCore Legacy Patcher.

Upgrading the MacOS

Upgrading the Macs takes a massive loads of time. There were several challenges I’ve stumbled upon.

⚒️ Reformatting the iMacs through Recovery mode

Reformatting with Macs (no matter the age of the hardware), took about 30 minutes to 2 hours each.

While rebooting the Macs, these were the steps I had to do: CMD + R Holding the Option key

😔 Remote Management (prior institutions)

Some Schools definitely purchase refurbished units as a creative measure to provide cool and workable solutions, hence some of the iMacs we had still had prior MDM profiles locked into the Serial numbers.

While handling this project on my own, I tend to rush to see the end-result, because I am excited to do this for my students and colleagues, so I did not pay attention to the WiFi and enabled it during the setup stage. So when the WiFi’s on, the Remote Management of previous Colleges or schools that our units were purchased from, kickstarted the profile management, and locked us out completely, without even logging into the Home Page. If I made the mistake, I have to take the iMac home (with permission) and set it up without WiFi, as my school’s WiFi SSID was already recored in the installed device and I can’t simply turn off the entire school’s WiFi just for an individual project.

😀 After-installation

Making sure the 2 steps above are done well, and ensuring that I connect the devices to the same WiFi SSID, then join the invitation link via AirPlay, I could gain control of the iMacs as showed below on my personal devices.


Apart from other teaching duties and Ad Hoc support, I am still happy that this is the intended result and control that I wanted since a decade ago, looks promising to what we can do for our students’ learning, just hoping that I can deploy to 24 computers by the end of Term.

Imagining for clearer discussions, instructions and teacher-directed website that we can deploy to students, without having to scream at the top of our lungs to have students to NOTICE our presence or go to the appropriate website while they struggle to type the web address spellings.

And I’m also happy, we get to save a ton of our budget and focus on other developments for the school (hoping the school knows that this project saved 5 digits of investments, muahahahah). Anyway doing it for the sake of getting students to stop asking: “Teacher, this website is not working, even though I followed your instructions.” A sincere facepalm.

With that, for a better learning for students and colleagues alike,

yours truly, Mr Dave.