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:.
How to format a drive for Mac and PC compatibility Posted by Ant on March 11th, 2012| 43 Comments If you have an external hard drive or USB flash drive that you’d like to use on both Macs and Windows PCs, choosing the right file system to format the drive can be confusing.
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:. 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. Since you're here.I've got a small favor to ask.
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What Is ExFAT? Microsoft's exFAT is a file system designed for cross-platform mobile personal storage. The exFAT format is designed for high-capacity flash drives, memory cards, and external hard drives. The format is designed to require minimal adjustments to add support from Microsoft's widely used FAT32 format on the developer and manufacturer side.
ExFAT improves on many of the FAT32 format's limitations, including increasing the maximum storage capacity per partition or reserved section from 32 gigabytes to 256 terabytes. External hard drives benefit from exFAT because you can set them up with large partitions that can contain the entire device - instead of in 32GB sections in FAT32 - and maintain compatibility between Macs and PCs.
Format to ExFAT on Windows 8 Windows 8's included Disk Management tool can format devices to exFAT. To format an external hard drive to exFAT with the tool, connect the hard drive to the computer, press 'Windows-R,' then type 'diskmgmet.msc' and select 'OK.' After the Disk Management program has launched, right-click on the external hard drive's partition graphic box.
The hard drive partitions are listed on the lower section of the Window. Recently attached devices will appear at the bottom of the list and the partition will be marked with the dark blue color bar on the top of the box. Select the 'Format.' Option from the menu.
Change the 'File System' drop menu to 'ExFAT' and press 'OK' to format the drive. Warnings and Tips Backup any data on the external hard drive you want to keep on another device before formatting. Formatting a hard drive will erase all data that's stored on it. Both Windows 8 and Mac OS X allow you to adjust the size of the format partitions on external hard drives.
Set the number to the maximum to use the entire drive in a single partition. FAT32-formatted drives also work for PC-and-Mac sharing, in particular with older versions of both operating systems. However, Microsoft recommends against using FAT32 whenever possible in favor of exFAT.