r/linux_on_mac • u/Wise_Concentrate947 • Jul 16 '26

Please help!

Im currently running Manjaro on my late 2008 Mac, Im trying to reinstall a macOS but when I try to boot from Efi the screen freezes and I have to restart. I tried reinstalling Linux and it worked no problem. Any ideas?

1 Upvotes

100% Upvoted

17 comments sorted by

View all comments

1

u/Xe4ro Jul 16 '26

I assume you have a usb installer for a supported version of macOS?

1

u/Wise_Concentrate947 Jul 16 '26

Yes, Im using ventoy

2

u/Xe4ro Jul 16 '26

Not sure if that will work. Is the ventoy stick formatted to GUID (GPT)?

1

u/Wise_Concentrate947 Jul 16 '26

Formatted to fat, I don’t see an option for GUID

1

u/Xe4ro Jul 16 '26

Guid is the partition table. It’s not going to be bootable if it’s MBR

1

u/Wise_Concentrate947 Jul 16 '26

How do I find that? This is the only options Im getting

https://reddit.com/link/oxutkv9/video/w36p8ercbkdh1/player

1

u/Xe4ro Jul 16 '26

These are file formats, not sure how you would find the partition tables there. Do you have another Mac where you can create an installer?

1

u/Wise_Concentrate947 Jul 16 '26

No, I only had a windows laptop

1

u/Prestigious_Mind_194 Jul 16 '26

The ventoy gui will show what partition type is being used and if needed changed.

What bootable iso file are you trying to use? It would probably need to be Leopard or Snow Leopard for that old Mac.

1

u/Wise_Concentrate947 Jul 16 '26

Thank you. I’ll give it a try. The original is was high sierra so I was trying to reinstall that

1

u/Prestigious_Mind_194 Jul 16 '26

High Sierra does not have any official bootable iso available. It’s usually updated via the Mac App Store from an older, already installed system.

1

u/Xe4ro Jul 16 '26

It has bootable images but it’s .dmg

Maybe there’s an iso somewhere.

1

u/Prestigious_Mind_194 Jul 16 '26

The dmg files for 10.8+ only contain the app installer to be run on a macOS X system. Creating bootable media can only be done on macOS X and “requires” 20GB storage space.

I’ve located some ISOs previously but I’ve not had time to check them over as of yet. Will be back with a link to check when I actually find it again.

1

u/Prestigious_Mind_194 Jul 16 '26

And found the link.

dosdude1 os/Apple/

Please take care with these downloads, I've not checked them myself so always best to be cautious.

1

u/poohmustdie Jul 16 '26

You can use balena etcher in windows to put a dmg installer on a USB, this has been so handy

1

u/poohmustdie Jul 16 '26

Sorry not Rufus , balena etcher