Darryl Lee
Assigned
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Reported
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Comments
My son has a Macbook Air (11-inch Mid 2013). With OS X 10.10 (Yosemite) he had the problem with the 1.18 not loading.
We attempted to install the 17.0.1 version of OpenJDK (https://jdk.java.net/17/) then tried starting Minecraft using the MultiMC launcher, specifying this particular version. No luck.
To me it seemed clear that this particular version of Java was not happy with this version of OS X. We tried upgrading to 10.11 (El Capitan), and again, no luck.
Then upgraded again to 10.12 (Sierra), and lo and behold, it worked.
If your Mac is capable of going to 10.12, I would try upgrading to that. A good article with hardware requirements, and more importantly, direct links to older installers is here:
I wanted to note that as I mentioned in MCL-20783, this also happened to us on OS X 10.10 (Yosemite), just for completeness.