I've actually been doing some pretty significant revamping of my computer setup in my classroom this year. As much as I adore tinkering with computers, keeping old machines relevant far past their prime, and working with weird software hacks to keep things running, I enjoy doing that with my
home machines. I've found that to be far less pleasant at work.
As an example, I had my early 2008 24" running Big Sur for a few months this year. It worked alright, but wasn't the most stable thing, in particular with a few of the apps I use on it (looking at you, PowerPoint) expecting Metal. I've since rolled it back to High Sierra, the last version that I've found to run stably and nearly fully supported on it.
The other changes have to do with hardware. I interact with and use seven primary computers each day. At the beginning of this school year, they were as follows:
166Main - 2013 27" iMac (3.2 i5, 32GB RAM, 512GB USB3 SSD, OCLP Monterey). My main computer on my desk in the classroom. Runs two external 20" ACDs for a total of three displays. Used for literally everything. Programming, 3D modeling, monitoring all the student computers, content creation, office productivity.
166Air - 2020 MacBook Air (M1, 8GB RAM, 256GB SSD, Monterey). My main laptop. I got it for myself last summer because I wanted one
166Srv - 2009 Mac mini (2.0GHz C2D, 8GB RAM, 128GB SSD, dosdude High Sierra). My classroom server. Used for file storage with a few external drives, Time Machine backups for all my other Macs, and running my lab management software because it's ancient and never got a 64-bit update.
166Projector - 2014 Mac mini (2.6GHz i5, 8GB RAM, 256GB SSD, Monterey). This runs the 75" 4K Newline interactive panel in my room. I need this machine to be snappy, responsive, and never make me wait on things. The 2014 struggled with the 4K display.
166Cart - 2011 11" MacBook Air (1.6GHz i5, 2GB RAM, 128GB SSD). It lives on a cart and does screen sharing sessions so that I can control and observe everything without being at my desk.
166TPA - 2010 27" iMac (2.93GHz i7, 32GB RAM, 256GB SSD, OCLP Big Sur). My main computer in my little office off to the side of my classroom. Used for most of the same things as 166Main, but not as intensely or for as long.
166Door - Early 2008 24" iMac (2.8GHz C2D, 4GB RAM, 64GB SSD, OCLP Big Sur). It shows my seating chart and various announcements. Not the most exciting computer.
As this year has gone on, I've replaced 166Main, 166Projector, and 166Cart and moved two of those machines into other roles to replace 166TPA and 166Srv. The new machines are as follows:
166Main - 2020 27" iMac (3.3GHz i5, 32GB RAM, 512GB SSD, Monterey). I got this for a fantastic deal here on the forums. For my main machine, I just want something solid and reliable, and this machine has been so thus far! I'd had to reinstall Monterey on my 2013 several times this year, and it was getting old on the computer I depend on daily. I hope to get many years of delightful service out of this iMac
166Projector - 2020 Mac mini (M1, 8GB RAM, 256GB SSD, Monterey). I got a solid deal for this here on the forums. This machine runs the screen without breaking a sweat. Doing things that would make the 2014 scream its fan in protest, this machine tiptoes through without breaking a sweat. I hope for many long years of service from this little computer.
166Srv - Old 166Projector. The 2014 now gets to live out its time quietly serving up files, time machine backups, and running my lab management software. Its fan doesn't scream in the pain of playing videos on a 4K screen any more
166TPA - Old 166Main. The 2013 runs so much cooler than the 2010 ever did, which is noticeable in my tiny office. Especially in Florida. For my needs in there, it's reliable enough. Just not enough to be my main computer again
166Cart - Late 2008 15" MacBook Pro (2.53GHz C2D, 8GB RAM, 256GB SSD, dosdude High Sierra). Great machine for this basic usage. The bigger screen is nice too since I use it to control the projector and bang out code - seeing a 75" 4K screen scaled down to an 11" screen wasn't fun.
I've made a few big changes, but there are still plenty of early Intel machines here. I don't plan on getting rid of the 2008 24" any time soon, not unless someone gives me something awesome to replace it for free. I hope that the 2008 15" MBP will serve me well for years to come. I'll keep these machines in use for even crazier long amounts of time, as I find it amusing that the 2008 machines are already pushing older than my oldest students.
Ultimately I want the computers I rely on at work to be boring, productive machines. If they can be fun to tinker with, that's great, but not at the expense of their ability to let me be productive.