Reinstall MacOS on a Macbook that doesn't have MacOS anymore?
I'm new to this site, so pardon me if I do or say something wrong.
I have an old MacBook late 2008 unibody that has Linux installed on it (3 different linuxes, don't ask why). I bought this MacBook second hand a while ago. I wanted to install Linux on my Mac but didn't know what I was doing back then, and accidentally deleted the whole MacOS and everything. Currently, I'm tripple booting my "Linuxes" via "rEFInd". I want to install the latest MacOS available for my model but I don't know how to do it. Where would I find a DMG and how would I install it. Could anyone guide me or help me? I don't have any warranty nor do I have an Apple store where I live.
Thanks,
You can obtain the latest Build of El Capitan (10.11.x) directly from Apple via this link.
As for creating a bootable USB installer, I would recommend converting the dmg to an iso via AcetoneISO.
It'll convert the DMG to an ISO for you. After that, create the bootable USB with your new yourmacos.iso using DD.
dd if=/path/to/yourmacos.iso of=/dev/sdX && sync
I don't know if you are familiar with this but dd does byte by byte copying and
sync ensures that all data has been written to your USB (so you can savely unplug/eject it afterwards).
The latest version of macOS (OS X) for your Mac is El Capitan (10.11.x). Tetsujin 's answer covers how to get El Captan. However, you will probably first need to get Snow Leopard (OS X 10.6.8) installed. I can no longer find a link where you can purchase a Snow Leopard DVD from Apple. The Snow Leopard license agreement states you can purchase a used copy of the DVD, but you can not legally download an ISO to burn to a DVD. However, once Snow Leopard is installed you probably are going to upgrade to El Capitan. This upgrade can be downloaded and installed at no cost. Apple assumes, if upgrading from Snow Leopard, that Snow Leopard was legally obtained.
So, if you still want to download a Snow Leopard ISO, there is a link to one possible way to do so. After installing Snow Leopard, you will need to download and install the Mac OS X 10.6.8 Update Combo v1.1 before installing El Capitan. (Actually, I would download the update to a flash drive before installing Snow Leopard.)