Mac system cannot read USB disk to start

php editor Xinyi tells you that many users have encountered a common problem when using Mac systems - they cannot boot from a USB flash drive. This may cause a lot of inconvenience to users, especially when the system needs to be reinstalled or repaired. But don’t worry, we will solve this problem for you in this article. Next, we will introduce some possible causes of this problem and provide several solutions so that you can easily boot your Mac system from a USB flash drive.

U disks and mobile hard disks are usually in NTFS or FAT32 format, and may encounter problems with being unable to read and write under Mac systems. In order to solve this problem, we can change the USB disk format to ExFAT, so that it can be recognized and used under both Windows and Mac systems. Here is how to change the format of a USB flash drive to ExFAT under Mac system.

Note: Before performing the following operations, please be sure to back up important data on your USB flash drive or mobile hard drive. This article applies to Mac OS 10.12, other versions of operating systems may be different, for reference only.

Operation steps:

1. Find “Launchpad”;

##2. Click "Others";

##3. Find "Disk Utility";

##4. Find the U disk and click “Erase”;

Tips: This step will format the U disk and hard disk data, please confirm whether the backup is completed.

##5. Select the ExFAT format and click “Erase”;

#6. Click "Finish" to format successfully.

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