#HOW DO I MAKE A MAC OS X STARTUP DISK INSTALL#
#HOW DO I MAKE A MAC OS X STARTUP DISK CODE#
#HOW DO I MAKE A MAC OS X STARTUP DISK PLUS#
#HOW DO I MAKE A MAC OS X STARTUP DISK WINDOWS 7#

Now you should be able to install macOS from a USB drive. (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') So, to proceed without verifying the image, from terminal, type in this command: sudo defaults write skip-verify true

#HOW DO I MAKE A MAC OS X STARTUP DISK CODE#

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). 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). Now you have to choices, change the date & time, which can work, but may not.

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. 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 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.

#HOW DO I MAKE A MAC OS X STARTUP DISK PLUS#

Here things start to get a little tricky.ДЇirst 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. 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). In most of the new mac computer, you can just press cmd+r while booting and the mac will automatically download everything you need to install the system, but the oldest does not have this tool. 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. 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. So basically, the USB drive cannot have any high level formatting, the Windows system should detect the drive as 'not formatted' for this to work, which it will if prepped right with Diskpart. When I tried to inject the image, Transmac told me that the drive was 'write protected'. Note: I use 'Rufus' for all other USB writing and formatting for Windows systems, it's a great app, but I had previously tried to format the drive as GPT using that, as a Fat32 partition. DISKPART> convert gptДiskPart successfully converted the selected disk to GPT format. DISKPART> cleanДiskPart succeeded in cleaning the disk. (Find the disk number) DISKPART> select disk x (from result of List Disk)Дisk x is now the selected disk. Here are the Diskpart commands used to prep the Flash Drive, just to have them here in case my Link does not work: diskpart I've been trying to post this to confirm that it works for some time, I just hope it helps someone else, because it is a very easy solution. Someone had reported that the method for using DISKPART did not work, but I have done this twice and it works remarkably well, and it's the only method I could find to create a Mac-Bootable Flash.

#HOW DO I MAKE A MAC OS X STARTUP DISK WINDOWS 7#

I used TransMac on Windows 7 to restore the image file I had to the Flash Drive, it created a bootable Mac image on my flash drive.

Dryden's Link, I was able to use the Diskpart command to clean and prep a GPT partition on a flash drive for an OSX Mavericks install image. I was never able to write a Mac installer image to my Flash Drive and have it bootable, unless I did it on a Mac. I know this question is old but it is still valid.

How do i make a mac os x startup disk