I had this problem with a friend computer, it was an old iMac and I'll tell you it is not going to be easy. The first thing you have to do is make sure what model you have the year when your computer has been released then check on the official apple website to see what is the latest macOS or Mac OS X version available for you computer. In this case, you have to download the dmg file, that can be found on the web, for example, one websites that provides some macOS and Mac OS X is this for El Capitan, if you need another version, I'm sorry but you have to search for it.
Here things start to get a little tricky. First of all you have to flash the image on a USB drive, I recommend etcher, that works on everything Mac, Linux and Windows too it's extremely easy to use and you just need to select the drive and the image and etcher will do everything by itself, plus it's free here.
When the USB drive is ready you can plug it in you mac and press alt option while booting, you have inserted a firmware password, it will ask you to unlock the firmware by inserting that password, else it will take you to all the bootable drives, including your USB device. If you see the mac logo with a stop icon over it, it means that you downloaded a too new version that is not supported from your mac, else it will start.
When it start, it won't install, saying that the system can't verify the downloaded image, that's why you have to navigate on the "utilities" menu on the top bar and open the terminal. That's basically because every image of mac has a certificate that can expire, so, if the certificate is expired you won't be able to make it work, unless you change the date the date is different from mac version to mac version, so based on that you have to change it, usually just search for when was that version released and se the current date to that date or even one or two days later to make it work. Then try to install the system, if this does not work again, you can start the installation without verifying the image, but you should really trust the image you're using from being corrupted or modified just to make sure the download went right, use the SHA-1 code to make the file has been downloaded right.
So, to proceed without verifying the image, from terminal, type in this command: Is possible that you won't need the sudo at the begin, in that case just remove it from the command and start from "defaults" Now you should be able to install macOS from a USB drive Just a little thing, make sure to have formatted the disk before proceeding, I would recommend to make a partition that takes the whole disk in mac Journaled format, then if you want you will be able to encrypt the disk the installer will ask you to do that later , instead, if the disk was encrypted before, you will have to insert the encryption key of the disk to continue the installation process.
Really hope this help, I spent a lot of hours to do this on a really old iMac from Good luck! You will be able to download a copy of old one version of powerISO by provided links this tutorial. Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count. Would you like to answer one of these unanswered questions instead?
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You need to set up a password first, since this command requires root privileges. The first thing you have to do is make sure what model you have the year when your computer has been released then check on the official apple website to see what is the latest macOS or Mac OS X version available for you computer. That's basically because every image of mac has a certificate that can expire, so, if the certificate is expired you won't be able to make it work, unless you change the date the date is different from mac version to mac version, so based on that you have to change it, usually just search for when was that version released and se the current date to that date or even one or two days later to make it work. Click the Restore tab. Redownload it with the following trick might work:
Any help would be greatly appreciated! Thanks for your response. However, the problem differs from the one you linked to since I do not want to run an OS X installation in Windows running in bootcamp on a Mac. What I want to do to is easily achievable using createinstallmedia or Disk Utility. The question asked is about how to create a bootable Mac installing USB in the windows embitterment.
Basically your question seems to ask the same thing. Yes, more or less. However, the answer provided isn't helpful in my case I'm afraid. Neither do I have a recovery partition available, nor another osx.
In fact, that is exactly the problem at hand. Michael D.
Dryden Michael D. Dryden 1, 6 Here are the Diskpart commands used to prep the Flash Drive, just to have them here in case my Link does not work: Rufus won't make a bootable USB compatible with Mac as it cannot interpret the boot loader at least not in Mavericks and up. Not say you didn't get an older version to work, however, just to keep others from wasting their time.
Josh Josh 9 1. Jawa 2, 5 16 I've been struggling with the same problem but this works for me: You can find out more on how to do this here.
If you want to make the process as painless and automated as possible, there's an app you can use called Lion Diskmaker. Simply download the app and in a few clicks and about 30 minutes your disk will be finished. The app also works with OS X Lion. Drag and drop the " InstallESD. This should make it appear in the Source box on the right.
If not, you may have to click the " Restore " tab as seen below. If you need help using your disk to restore your Mac, Apple has a helpful page in its Support section. When following these instructions we got a persistent error message when restoring the boot image to the USB partition, "Restore Failure Could not restore — Invalid argument".
However it appears that this has no effect on the restore, and the USB is usable afterwards. Yes, you can ignore this error. We've seen it too on some Macs, but as you say, it still works just fine.