mynameismatthew Posted December 15, 2016 Share Posted December 15, 2016 HiI am trying to dual boot macOS but I get a mediakit error when I try partitioning a hard drive. I read that this is because my windows EFI partition is too small and I want to know how to make it >200 mb and not lose data? I downloaded 64 gb GTA V files and really don't wanna do that again xDHope someone can point me in the right directionHelp Link to comment Share on other sites More sharing options...
marco.pisellonio80 Posted December 16, 2016 Share Posted December 16, 2016 Your EFI is less than 200mb cause you probably have installed windows first. So, you don't need to resize EFI, just shrink your windows partition with partition editor to create the free space for Osx, than create a new fat partition, run installer, format the new partition in Hfs+ and install macos. Then installclover in efi, it works also in a 100mb partition. I have exactely this situation in my laptop in signature. Link to comment Share on other sites More sharing options...
mynameismatthew Posted December 16, 2016 Author Share Posted December 16, 2016 Your EFI is less than 200mb cause you probably have installed windows first. So, you don't need to resize EFI, just shrink your windows partition with partition editor to create the free space for Osx, than create a new fat partition, run installer, format the new partition in Hfs+ and install macos. Then installclover in efi, it works also in a 100mb partition. I have exactely this situation in my laptop in signature. wait how do I format in hfs+ on Windows? or do you mean in installer, because disk utility is useless with an EFI sized less than 200 mb to my knowledge aghh is there any tutorials doing what you're doing? Link to comment Share on other sites More sharing options...
marco.pisellonio80 Posted December 16, 2016 Share Posted December 16, 2016 1) shrink windows partition with partition editor (in windows) 2) create a new partition in fat32 from free space with partition editor 3) start mac installer, when you'll see the list of volumes where to install osx choose the fat32, open disk utility and format in hfs+. 4) install macos/osx 5) install clover in esp. Efi is <200mb but it doesn't matter. If it doesn'work, use gparted, is free. Download and install it on a pendrive, boot from it and resize/ create partitions This is a guide, but in italian. Anyway, the pictures are clear. http://www.insanelymac.com/forum/topic/317725-tripledualquad-boot-uefi/ Link to comment Share on other sites More sharing options...
mynameismatthew Posted December 16, 2016 Author Share Posted December 16, 2016 I still get the same MediaKit error when trying to do anything in disk utility Installer doesn't see ms dos fat32 partition Link to comment Share on other sites More sharing options...
mynameismatthew Posted December 16, 2016 Author Share Posted December 16, 2016 Is it possible to make a HFS partition in Windows? Link to comment Share on other sites More sharing options...
marco.pisellonio80 Posted December 16, 2016 Share Posted December 16, 2016 Not in windows. You can download a linux distro (es ubuntu or Linux mint), install on a pendrive using Rufus, run the distro, connect to the web, open terminal and past "sudo apt-get install hfsprogs", then open Gparted and you'll be able to format hte partition you create in HFS+. Then install OSX Link to comment Share on other sites More sharing options...
mynameismatthew Posted December 16, 2016 Author Share Posted December 16, 2016 Not in windows. You can download a linux distro (es ubuntu or Linux mint), install on a pendrive using Rufus, run the distro, connect to the web, open terminal and past "sudo apt-get install hfsprogs", then open Gparted and you'll be able to format hte partition you create in HFS+. Then install OSX Hey, thanks for all your help, appreciate it. I've figured it out on my own. For anyone curious, I created a new EFI partition in my hard drive and made it 400 mb. Then I copied boot files from the old 100mb one and removed it. After this, Disk Utility worked fine and the Sierra install went smooth. Windows boots as well, and no data was lost. Very happy! Link to comment Share on other sites More sharing options...
joe75 Posted December 17, 2016 Share Posted December 17, 2016 If you don't mind, can you post the output from diskutil list command? 1 Link to comment Share on other sites More sharing options...
marco.pisellonio80 Posted December 17, 2016 Share Posted December 17, 2016 This is another solutuon I didn't think before. Happy for you Link to comment Share on other sites More sharing options...
mynameismatthew Posted December 17, 2016 Author Share Posted December 17, 2016 If you don't mind, can you post the output from diskutil list command? This? http://prntscr.com/dkivmu disk0 is my bootable usb, I haven't installed clover to disk yet but I had to have my windows EFI be >200mb for OS X to install on the same HD as it. Link to comment Share on other sites More sharing options...
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