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Did anyone succeed in installing Mojave on the MacBook Pro 16”? It ships with Catalina but my corporate requires Mojave to connect to the corporate network.

I followed the instructions here but once I select booting from the Mojave external drive I get a “forbidden” icon and the system shuts down.

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    On which format, you formatted your USB to make bootable USB of Mojave. It should be Mac OS Extended (Journaled) – Udhy Nov 20 at 17:16
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    Mac OS extended (journaled) – Ronen Nov 20 at 17:21
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    Take a look at this answer apple.stackexchange.com/a/373548/279727 – Nimesh Neema Nov 20 at 18:44
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    This is something you need to address with your corporate IT people. Seems like they are still using some 32-bit software for networking. – benwiggy Nov 20 at 23:02
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No. This won’t work since the drivers to run this hardware only ship with Catalina.

If your support team isn’t ready for Catalina have them get you VMware fusion so you can run the older OS virtually while they contemplate supporting the new os.

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    Thanks. I will try the VM path and see if they bite. I suspect they won't. – Ronen Nov 20 at 18:44
  • Why can't you grab the drivers that ship with Catalina and use them under Mojave? – Sean Nov 21 at 1:57
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    @sean the T2 chip runs secure boot, so you’re looking at reversing that os, bridge os, macOS and all the peripherals. Getting Mojave ready is the least of the challenges that face Ronan. Great question, though - glad you commented. It’s possible Apple didn’t close the door hard, but very unlikely – bmike Nov 21 at 4:11
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    @Sean Even if they're installed, there's no guarantee that the old OS will know that those are the drivers it should use - or even that it's able to use them. You're literally trying to make an OS run hardware from the future. – benwiggy Nov 21 at 8:06
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Likely Possible. I partitioned the drive got the Mojave install on and it booted in Mojave but then wanted to confirm startup disk I selected Mojave and eventually also gave the forbidden icon. So it boots but Apple mark it as incorrect at the final part of the load. These chipsets were used in previous MacBook. So maybe using Hackintosh tools we can get past this part.

People saying use VM ignore that there are many high end apps like Soundgrid in Music that will take too much performance hit running in a virtual machine. Apple are mad forcing use to use a new OS until the software is ready.

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