If you’re using both Windows and macOS, you’ve to deal with when mac refuses to boot. The reason behind can be from a number of things that could go wrong. This includes system failure, bad updates, power failure, hardware failure. Unless there is a hardware problem that only can be diagnosed at the apple center you can fix your Apple computer.

A new external hard drive or a USB flash drive that you just bought can be used with both Mac and PC, but not always straight out of the box because most of them (external hard drives or USB flash drive) are sold in NTFS format, which is fully compatible only with Windows.

It is an excellent practice always to have a bootable macOS USB, which you can easily create using macOS operating system. But since we’re here, you probably can want to make bootable USB using Windows 10. Let’s be real, and there are more Windows computers compared to MAC. Fortunately, you can use a Windows computer to create a bootable USB flash drive.

In this article, we’ll help you with the instructions to create a bootable MacOS USB installation media from a Windows 10 computer. So that you can use that USB to install or reinstall (upgrade) Apple’s MacOS. You can create a macos Catalina/sierra bootable USB using this guide to fix your operating system.

  • Prepare a Thumb Drive for Both Windows and OS X On Windows, connect your thumb drive. Click Start File Explorer This PC. Right-click your flash drive and then select Format.
  • Learn how to format your USB flash drive or USB external drive so you can use it on both Mac OS X and Windows computers. Now you can share files between a Ma.

What’s needed?

You will need a few things before you get started. The first essential thing in it is a USB drive would be awesome if you use a USB 3.0, but you can get the work done using slow USB as well. So, in contrast, you need these following things.

  1. One high-quality USB flash drive with 16GB of storage.
  2. TransMac software.
  3. MacOS operating system image (DMG file).

How to Create a macos Catalina bootable usb

The guide is simple and straightforward if you follow thiese step.

Download and install TransMac on your Windows PC. It’s paid software with 15-day trial, so you can use it within the time to create a bootable MacOS USB flash drive. If you like the software and to support the developer you can buy the full version.

Plug the USB drive to your Windows computer that you’ll be using to fix your MacOS. And we are going to tell you something straightforward – backup if things stored in USB Drive.

Step 1. Open the TransMac, and select Run as administrator. If you’re using the trial version, wait 15 seconds, and click Run.

Step 2. Use your USB drive right-click on it and select format disk format this will format the USB drive so that it can be used to store the Mac OS operating system. One thing you need took care of that the USB drive needs in GPT partition in order to work on a Mac computer otherwise it won’t boot.

When it prompts select a name for your USB it doesn’t matter but just do it and click ok. If the formatting completed successfully, click OK to continue.

Step 3. Again from the left sidebar right-click on the USB drive and select restore with disk image.

Step 4. Now browse to the location where the Mac OS system image file is located and click ok to load it.

Step 5. Click Yes to create the macOS USB bootable media.

It will take a few minutes to complete the process because the Mac Operating System is larger than any other operating systems like Windows and LINUX in size. Now plug the USB drive to Mac computer in order to install, install or upgrade the operating system to the latest version of Mac OS, which can be Sierra or later.

THE TOOL CAN

  • Apple File System (APFS) volume read support.
  • Open Mac APFS/HFS/HFS+ format disk drives, flash drives, CD/DVD/Blu-ray media, HD floppies, dmg, dmgpart, sparsebundle and sparseimage files.
  • Copy files to Mac HFS+ disks and dmg images.
    Format as HFS+ for Mac .
  • Save and restore images of disks and flash drives.
  • Create, compress, expand and split dmg files.
  • Built in burner functionality to burn ISO and dmg files directly to CD/DVD/Blu-Ray.
  • Read Mac multisession and hybrid CDs.
  • View partition layout.

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.

  1. Open Command Prompt as an administrator. Type cmd in run dialog or open it from the start menu.
  2. Type the diskpart command and press Enter. This will display that is connected to your computer.
  3. Enter the list disk command to view all drives connected to your computer and press Enter. This command will show all of the partitions inside of a disc.
  4. Type the select disk command followed the number assigned for the USB flash drive (e.g., select disk 4), and press Enter. This command will select the disc partition of your choice.
  5. Enter the clean command and press Enter. This erases and formats the disc.
  6. Type the convert GPT command and press Enter. This convert master boot record to new GPT.
  7. Enter the create partition primary command and press Enter to complete the process.

Quickly create a macOS bootable USB on Windows

Now make bootable USB using the TransMac software (follow instructions that are given above). Now connect the USB and power on your Mac computer while holding the option key and then select the USB Flash media to run the installation.

Learn using USB on MAC (Apple support page)

Learn more about making bootable USB.

Article Contents

Dec 16, 2020 • Filed to: Solve Mac Problems • Proven solutions

'I just bought a new USB flash drive and a hard drive for extra storage, but they are not compatible with my Mac. The only solution I can find is to format the drives but I don’t know how to perform it. Can someone tell me how do I format a new hard drive for Mac?'

There are lots of people who mistakenly think that the USB drives and hard drives format don’t really matter. But the reality is quite different. Whether it is a hard drive or USB or internal drive, Mac uses different format support. So, you can’t simply use the same drive with both Windows and Mac. As a result, you will need to format the hard drive for Mac. Using the Mac preferred file system is important otherwise the files will be of no use to you.

In this article, we are going to discuss how to format a hard drive for Mac and some related terms too.

Part 1. Situations When Formatting a Hard Drive on Mac:

Before you get deep, you must understand what is the drive formatting. Some people confuse the term with reformatting. Basically, formatting is the process of preparing the storage devices such as hard disk drive, solid-state drive, USB flash drive, or any other for initial use.

The basic operation is termed as low-level formatting which means erasing the existing data on the disk. But it leaves the track to recover the data using the recovery tool.

There is another term related to disk formatting and it is called reformatting. It is called high-level formatting as it is used to prepare the disk for different file system formats. It is usually done during the OS installation or adding a new disk. Reformatting is done to free the storage space from the previous content stored in it.

You can consider disk formatting in macOS in various circumstances. Whether your system has corrupted data, damaged software, impending system upgrade, storage is full, or it is running slow, formatting will fix a lot of issues. Take a look at the scenarios given below and you will be sure that disk formatting will help you.

  • If you want to quickly erase all content from the drive permanently without leaving a trace of data on it.
  • If you want to change the format of the disk such as PC format like FAT or exFAT to Mac format.
  • If you see the message that the disk is not readable by Mac.
  • If you want to resolve a disk issue that can’t be fixed by the Repair feature of Disk Utility.
  • If the macOS installer can’t see the disk or unable to install it.
  • In case the macOS installer says that the drive can’t be installed because it is a part of Apple RAID.

Under all these situations, formatting is most likely to fix your problems and you will be able to use the drive on Mac.

Part 2. How to Format a Hard Drive on Mac:

Formatting is a very simple procedure that is operated in a similar way for all sorts of storage media. So, whether you wish to format the internal hard drive, external drive, or a USB flash drive, the procedure is the same for all. Here is the step by step guide you need to follow to format the hard disk on Mac. Before you erase a disk, make sure that you have a backup of the files you want to keep.

Step 1: Connect the USB drive or external drive to Mac and launch the Disk Utility from Applications.

Step 2: From the left side panel, pick the volume or the drive that you want to format and switch to the Erase tab.

Step 3: As you click on the Erase button, you will see several fields in the section. Enter the given information-

  • Name- Enter a name for the disk such as Macintosh HD/SSD/USB Drive or anything else you want.
  • Format- You have to choose a Mac supported format from the list. The most recommended format is APFS or Mac OS Extended (Journaled). There are numerous other formats too which will be displayed in the drop-down menu. You can select any format as per your requirement.
  • The scheme- If this option is available, then you should choose the GUID Partition Map from the option.

Step 4: After specifying the fields, click on the Erase button at the bottom of the window and Disk Utility will format the drive.

Once the formatting is complete, you can use the disk for a backup drive, sharing, time machine backup, or any other requirement. In case if the drive doesn’t appear in the Disk Utility interface, you will have to disconnect all the extra and non-essential devices connected to Mac. Make sure that the External drive is on and connected properly. Restart your Mac and then carry out the task.

Part 3. How to Perform Mac Data Recovery After Format:

There are situations when Mac users don’t get the chance to create a backup of their data and forced to format the hard drive. But you don’t need to panic. You can get your hands on Recoverit data recovery for Mac. If you have mistakenly formatted the data that you still need, Recoverit is the best chance you have to get the files back. It is a complete data recovery solution that is capable of recovering all kinds of files with wide format support of 1000+.

You can download the software from the official website and install it immediately on Mac. Once the setup is complete, follow the steps below to recover formatted drive files.

Step 1: Specify Location:

Run the program and specify a location from the main drive. If data is lost from an external drive or USB flash drive, then you’ll have to connect the drive with the system and then specify the location.

Click on the Start button to initiate the scanning process.

Step 2: Scan Results:

Depending on the data that is lost or deleted, scanning will take some time. As the process finishes, the files will be displayed on the screen according to their respective format.

You can decide whether you want to look for files according to file type or file path. You can also stop the scanning process in between if the results are displayed before the scanning finishes.

Step 3: Preview and Recover Formatted Data:

As soon as the data is displayed on the screen, you can have a preview of the files. Select as many files as you want and have a preview of the files. Tap on the Recover button to save the files on your system.

As you are retrieving the files, keep in mind not to save the files in the previous location. Depending on the amount of recovery, it will take a while and ultimately you’ll have your files back. If the normal scan doesn’t work for you, Recoverit also has a deep scan mode to look deeper for the deleted and lost files.

Format Flash Drive For Mac On Pc Computer

Part 4. Different Formats of Hard Drive for Mac:

Mac Hard drives have wide support for formats but there are two major formats that are preferably used by the Mac users. It also depends on the macOS version you are using. The key point to consider is that the drives formatted with the newer versions won’t be recognized by the older devices. So, when you are formatting a USB drive, it will be ideal to choose the right format which is Mac OS Extended.

The supported Mac formats for the drive are explained below:

APFS:

The APFS format is optimal for Solid State Drive such as flash drives. Hence, if you are formatting a flash drive, you should definitely choose the APFS format. Along with the flash drives, this format is also faster and more reliable for Mac hard drives.

Format flash drive for mac on windows

Mac OS Extended:

Talking about Mac OS Extended, it is perfectly suitable if you want to use a drive for backup. The Time Machine feature of Mac still doesn’t have support for APFS disk. In case you select this format, Time Machine will prompt you to reformat the drive.

When you are formatting disk on Mac, keep some things in mind. Never ever change the inbuilt format of a Mac drive.

Part 5. Tips for Formatting a Hard Drive on Mac:

Even though formatting doesn’t seem like a big deal, still it can be very helpful. So, you must stay active and keep all things in mind. Here are some tips that might help you when you are about to format a Mac hard drive.

Format Flash Drive For Mac And Pc Large Files

  • Disk Utility in macOS Sierra and later chooses a compatible format for you automatically. But you should know the default format for your drive. It is advised not to change the default format of a Mac hard drive under any circumstances.
  • You can check the format of a drive inside the Disk Utility Menu bar. Just click on the Get Info option and you’ll know the current format a drive is using to store files. Open the System information and select the storage. In the right-side panel, you will see the respective format for each volume on your Mac.
  • If you want to erase your disk before you install the latest High Sierra on your Mac for the first time, then opt-out for the Mac OS Extended format. During the installation of OS, the macOS installer will automatically decide whether to use APFS or Mac OS Extended for the disk.
  • You can also use the FAT32 format on Mac for USB drives if you wish to use it on both Mac and Windows. The FAT32 format can be read and written on both OS and hence it is the most versatile format for use.
  • If you wish to transfer big files from Windows to Mac, you’ll still have an alternative, i.e. exFAT. This format doesn’t have a file limit but it can only be read on Mac OS X Snow Leopard or later.

So, before you pick out the format, look out for the advantages and the disadvantages of the formats to choose the optimal format for Mac. The Windows supported format is usually listed as an MS-DOS format in the list of formats.

Wrapping It Up:

Flash Drives For Mac Computers

Jiffy gmail account creator. As you can see, now you know how to format hard drive/ USB flash drive/ internal drive/external drive on Mac. So, from now on whenever someone is in need, you can help them. And formatting doesn’t always finish without complications. So, if you lost some important files while formatting the drive, you can use Recoverit data recovery software for Mac to restore them in the original condition. Recommend the software to your friends and family and let them know that there is a master tool for recovery for both Mac and Windows OS in the market.

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