UPDATED 12/2/18: It doesn’t matter whether you’re a macOS Sierra or a Windows 10 user, it’s just a matter of time until your device refuses to boot, which could be for a number of reasons, including file corruption, hardware failure, buggy update, etc. If the unexpected happens with Apple computer, you can use a macOS bootable USB with the installation media to repair it. This is one of the main reasons why you should always consider making a macOS bootable USB when your device is working properly. However, if it happens that none of your devices (MacBook, MacBook Air, MacBook Pro, iMac, Mac Pro or Mac Mini) are not working when you need them the most, then you can use a Windows PC to rescue your Apple device. You can use a Windows 7/8.1, or a Windows 10 PC to quickly make a USB bootable installation media to reinstall macOS Sierra on your Mac. In this, you’ll learn the steps to make a macOS Sierra bootable USB installation on Windows 10, which you can use to reinstall or upgrade Apple’s OS. Things to know before proceeding Before you dive into this guide, you’ll need a few things:.
In the given article, we learn how to create recovery partition for Windows 10 and MAX OS X (Yosemite) which proves to be helpful for users looking to store their data. However, before we understand the fundamentals that help create recovery partition in Windows 10 and MAC OS X (Yosemite), we must garner additional information about the subject.
A broken Mac computer with Mac OS X or (version 10.12 or later). A trial copy of the TransMac software. One high quality USB flash drive with 16GB of storage. A copy of Apple’s macOS (DMG file). How to make a macOS bootable USB installation media To create a bootable USB drive with the latest version of macOS, do the following:.
![For For](http://www.trickyways.com/wp-content/uploads/2010/02/03-create-delete-partion-through-boot-camp.jpg)
This is a paid software, but it gives you a 15-day trial, which is more than enough time. (If this works for you and want to support the developer, you can purchase the full version.). Connect the USB flash drive you want to use to fix your Mac.
If you have any data on the USB, remember to make a backup, as everything on it will be erased. Right-click TransMac, and select Run as administrator.
If you’re using the trial version, wait 15 seconds, and click Run. On the left, right-click the USB flash drive, select Format Disk for Mac. You want to do this before creating the bootable media because there is a good chance that the drive was formatted using a Windows device. If this is the case, chances are that it’s using a MBR partition, and the USB drive needs a GPT partition to work on a Mac.
On the warning message, click Yes to format the drive. Enter a name for the drive, such as “macOS bootable USB” and click OK. Click Yes to confirm. If the formatting completed successfully, click OK to continue. Right-click the USB flash drive, and select Restore with Disk Image.
On the warning message, click Yes to confirm the data on the USB drive will be erased. Click the browse button on the right, locate the.dmg file with the macOS installation files. Click Open. Click Yes to create the macOS USB bootable media. Once the process completes, you can now insert the USB flash drive on your Mac computer to install, reinstall, or upgrade the operating system to the latest version of macOS, which can be Sierra or later. How to create a GPT partition on a USB flash drive If the USB flash drive is not working using TransMac, it could be still a partition problem. In this case, you want to redo the entire process again, but this time use the following steps to use the Diskpart command-line utility on Windows to create the appropriate GPT partition.
Open Command Prompt as an administrator. Type the diskpart command and press Enter. Enter the list disk command to view all drives connected to your computer and press Enter. Type the select disk command followed the number assigned for the USB flash drive (e.g., select disk 4), and press Enter. Enter the clean command and press Enter.
Type the convert GPT command and press Enter. Enter the create partition primary command and press Enter to complete the process. Once you formatted the USB flash drive to a GPT partition, you can use the instructions mentioned above to use TransMac to create a bootable media, but this time skip the steps 5 through 9, and continue on step 10.
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Is there anyway to install Windows 7 (64 bits) and Mac OS X Lion in the same hard drive using the GUID partition style? I have a hard drive of 2 TB. I want 3 primary partitions, one for Windows (NTFS), one for Lion (HFSJ+) and one with all my documents, images, music, etc (HFSJ+).
In Windows I use MacDrive to access the two HFSJ+ partition. The problem is that Mac and Windows seems to don't understand the same for GPT partitions. First I boot the Windows DVD, use diskpart to create 5 primary partitions, the EFI (200 MiB), the MSR (128 MiB), the Windows (about 400 GiB), the Mac OS (also about 400 GiB), and the rest for documents (about 1 TiB).
The EFI is formatted in FAT32, and the rest in NTFS. I install Windows Ultimate Edition 64 bits. Everything goes fine. Then I boot the Snow Leopard DVD and use the Disk Utility to format the 2 last partitions in HFSJ+. But there seems that Mac mess with the partitions, create anothers with unused space and then Windows won't boot. So I try the other way.
![Windows Windows](http://cdn.osxdaily.com/wp-content/uploads/2011/04/create-new-partition-mac.jpg)
First I boot with Mac DVD create the partitions with GUID partition table. And then boot with the Windows DVD but at the time of partitions Windows don't let me to install in any partition because say that the partitions are MBR and I must use GPT. I look at diskpart and Mac seems to create a extrange partition scheme. Puts about 100 MiB between partition. Anybody knows how to fix this. Well it was like a nightmare but I finally get a GPT disk with the partitions I wanted. The problem is that Windows and Mac don't understand the same for GUID partition.
And from what I know about GPT the one who has right is Windows. The Utility Disk of Mac do a mess with the partitions and don't ask you. Well the solution to make the partitions that I wanted was to trick Mac. Here's how I did it if anybody wants to know. First boot with Windows DVD. Diskpart - select disk 0 - clean - convert gpt - create partition efi size=200 - format fs=fat32 quick.
Windows create this partition at the beggining of the disk with a offset of 1024 KiB, as it should be. Reboot and put Snow Leopard DVD. Disk Utility. Add 3 partitions, all with Mac OS Plus (Journaled).
The first and the second with the same space and the third with about 1.11 TB (Windows then recognizes about 1 TiB). Reboot and put the Windows DVD again. That's where you can you see that Utility Disk has changed everything. The EFI partition was moved to a offset of 20 KiB. So the others partition followed this change. Between the second and the third partition added a 128 MiB unusuded space and after the last partition there is also a 127 MiB unused space. So what I did is to delete the EFI partition and the second partition.
I create again the EFI partition. Create partition efi - format fs=fat32 quick. It creates a 199 MiB EFI partition thanks to the Utility Disk, but that's OK. The minimum for this partition is 100 MiB and honestly Windows use less than 5 MiB. Then create a primary partition that will use the space of the old second partition and the 128 MiB that left unused Utility Disk. Create partition primary - format fs=ntfs quick. And finally with the 127 MiB that left I create the MSR partition.
Create partition msr. It should be 128 MiB but It worked anyway. So Windows goes to the second partition, Lion to the first. And both uses the third partition for documents, images, music, etc.
I don't know if to anybody have happened this, but if you are in a situation similar to this, my advice is that you first create the partitions the way that you want with the Disk Utility and then go with Diskpart and see what kind of mess this 'Utility' created and try to find a solution without erasing the HFS+ partitions that are the only goal.