We’re planning to drop support of some legacy macOS versions in our Mac apps — Macs Fan Control and AnyToISO — soon. If your Mac stays on one of them, nothing breaks: the last version that supports your system will always remain available on the download page (Macs Fan Control, AnyToISO).
Some numbers
Here is how our macOS users are distributed today, according to the last 90 days of usage statistics (June - August 2026):
| macOS version | Share |
|---|---|
| macOS 11 Big Sur | 1.48% |
| macOS 10.15 Catalina | 1.87% |
| macOS 10.14 Mojave | 1.21% |
| macOS 10.13 High Sierra | 3.19% |
| macOS 10.12 Sierra | 0.16% |
| macOS 10.11 El Capitan | 0.16% |
| macOS 10.9 Mavericks | 0.04% |
| macOS 10.7 Lion | 0.01% |
| Total below macOS 12 | 8.12% |
Everything older than macOS 12 Monterey adds up to 8.12%, and this number keeps shrinking every month.
The plan
We will do it gradually, in two steps.
Step 1 - drop macOS 10.7 (Lion) through macOS 10.12 (Sierra). Both apps already serve these systems with a separate legacy build: the main Macs Fan Control download has required macOS 10.13 since version 1.5.9. This step simply retires those second builds and affects 0.37% of our users.
Step 2 - drop macOS 10.13 (High Sierra), 10.14 (Mojave), 10.15 (Catalina) and 11 (Big Sur). After that macOS 12 (Monterey) becomes the minimum requirement for new versions of both apps. This step is a much bigger one (7.75% of users), which is exactly why we keep it separate and later.
We are not announcing exact dates yet - consider this a heads-up rather than a deadline.
Why
Every additional macOS release we keep on the list means an older SDK, an older compiler, an older version of the frameworks we build on and real hardware kept around to test on. That is time that does not go into the further development of the apps — support for new Mac models, new features and bug fixes for the remaining 92% of users. Apple itself ships security updates only for the three most recent macOS releases, so most of the systems in the table above have been out of support for years already.
What it means for you
- The version you already have installed keeps working. Nothing is disabled remotely and nothing expires.
- The last compatible version stays downloadable from the download page (Macs Fan Control, AnyToISO) - exactly as it has been for OS X 10.6 since 2015 and for Windows XP/Vista since 2021.
- What you will not get on a legacy system is new features and bug fixes.
- Licensing is not affected: already issued Pro licenses continue to work normally on legacy systems, and if you upgrade your macOS later there is no need to buy a new license.
Can your Mac run macOS 12?
Quite possibly - the requirements are less strict than many expect. macOS 12 Monterey can be officially installed on:
- MacBook (Early 2016 or newer)
- MacBook Air (Early 2015 or newer)
- MacBook Pro (Early 2015 or newer)
- iMac (Late 2015 or newer)
- iMac Pro (2017)
- Mac mini (Late 2014 or newer)
- Mac Pro (Late 2013 or newer)
If your Mac is on that list, upgrading is the easiest way to keep receiving updates for both apps.