But if the mount option is grayed out but you can see this external hard drive in disk utility, you can try another solution then. The usb flash drive recovery for mac features a friendly, spontaneous interface, making it the best usb drive repair software for mac operating systems. Using techtool pro to test and repair your drive micromat inc. Aug 08, 2019 for corrupt drive, you need to run your mac in safe mode to repair file system issuesthis works similar to disk utilitys first aid on the startup drive. Sep 14, 2015 how to start up your mac from an external usb storage device. How to force a hard drive to unmount for formatting in mac os. We collected several fixes for you to try and make your usb flash drive detected by mac computer. Back up as many of your files as possible, reformat the disk, and restore your backedup files. Fix usb corrupt partition map on macos kepler donald medium. Even though i did it, my mac claims that it wasnt eject properly. Use first aid to repair usb drives mac allows the user to fix external drives related problems via disk utility. Oct 06, 2016 have you ever tried to format a disk in mac os x and disk utility wont unmount the hard drive for formatting.
Feb 29, 2016 today i am showing how to make a boot able usb drive for mac using a. You can use disk utilitys first aid on your macs startup drive. Then i got the dreaded message disk utility stopped repairing macintosh hd disk utility cant repair this disk. How to recover deleted files from a usb flash drive on mac. Nov 19, 2019 you can use disk utilitys first aid on your macs startup drive.
To repair the usb drive we will use the chkdsk utility within command prompt. Fix corrupted flash disk with petousb utility flash drive. Let the scan process complete, then close the scan window. We are going to use a terminal utility called dd to copy the contents bit by bit of the disk image we created to the drive. Apr 24, 2020 therefore, when disk utility fails to repair corruption, you can use terminal app commands to try fixing the logical damages in your mac drive volumes. The boot cd is a collection of different free and legal software designed to solve different computerrelated problems. If that doesnt work, back up as much of your data as possible, reformat the disk, reinstall macos, then restore your backedup data.
It provides the user access to contents of the internal drive, assuming the data is safe and not corrupted. Press enter, cmd will correct all pny flash drive errors without formatting. First aid has the ability to fix unreadable usb flash drive error. When using a pc to carry out some tasks and there are some complex tasks that can be carried out much easier by just using a usb flash drive or a cd. Using from an external source like the usb drive helps the user get around the problem. Select the usb drive from the sidebar and then click the erase tab. Best usb format tools pen drive stick formatters for. This will make it so that you can view the containing drive like apple ssd rather than simply the partition or volume that is accessible by the user facing part of the file system like macintosh hd. How to fix external hard drive not mounting on mac computer. Step 5 the tool will scan the usb drive and repair usb drive errors if it can find any. In this case, you need to send it to a local data recovery service. Most of people when they format or open their flash. The program is able to format and repair usb flash drives under windows 7, windows 10 and earlier versions of the os. How to repair a disk on mac os x from command line.
Repair your macs drives with disk utilitys first aid. Now when i run disk utility and click repair disk it says. How to recover data from damaged mac or external drive. It can happen for external usb and firewire as well as internal disks. Or you can just open disk utility by finder applications utility. Open disk utility it is in applicationsutilities and click new image with.
This will launch apples startup manager which shows bootable devices connected to the machine. Best bootable utility tools kit iso for usb flash drive or. Mac startup key combinations learn about the mac features and tools that you can access by holding down one or more keys during startup. Users would have to configure their usb to recognize an iso file. Making bootable usb of mac os x with disk utility youtube. This feature checks the file system for errors and attempts to correct them, all without much intervention from you. To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your mac. Open terminal in the same place as disk utility and type in diskutil list and locate your drive. How to start up your mac from an external usb storage device. Repair this unmountable external hard drive with first aid. The usb drive is corrupted cannot be detected by mac. Disk utilitys first aid is your first choice to repair usb flash drive, pen drive, and other external drives on mac. How to use your macs disk utility to partition, wipe, repair.
Download free usb flashpen drive repair tool and recover data. Repair a storage device in disk utility on mac apple support. There is also an alternative that does not use the command line that is shown below. Free usb repair tool to repair flash drive and recover data. Today i am showing how to make a boot able usb drive for mac using a. If a hard drive is acting up, disk utilitys first aid function is the first thing you should try. Both solid state and rotational hard drives can be the most errorprone components in your mac. Techtool pro 8, techtool pro classic, and diskstudio. From launchpad, click the utilities folder and then click the disk.
If disk utility cant repair your disk, or you receive a report that the first aid process failed, try to repair the disk or partition again. I might have accidentally disconnected the hard drive without ejecting it first. First aid on recovery mode can serve as a computer flash drive repair tool on mac. Click recover to restore the files to a designated location. When disk utility cant repair this disk error appears if you forget to make a backup of your external hard drive or other data drives and format it, free download minitool mac data recovery on your mac. It will not affect the performance of the flash drive. Apr 16, 2020 to recover deleted files from a usb drive on mac. Download free usb flashpen drive repair tool and recover. Repair mac external hard drive without disk utility mac. If your usb drive is seriously broken by hitting, dropping, shaking, etc. If the drive partitions is still visible in the left column as the second indented row under the hard drive itself, but is not mounted on the desktop, you can try to run a repair on the partition using.
Place it on a usb drive, boot your virusladen machine, and scan the mounted drives with clamav, antivir, bitdefender, and more. On the 32gb usb drive that i use, i set the installer partition at 7gb and use the rest for the utility partition using disk utility before running the diskmaker x utility, a minimum size is probably more like 8gbsuch as using an 8gb usb drive. To make flash drive show up on mac again, we have collected seven useful methods. Gone are the days when partitioning a hard drive, restoring files from a pc with malfunctioning os, testing hardware or resetting a lost password was. It also helps to repair the mac disk with disk utility and other tools. Reparieren eines speichermediums im festplattendienstprogramm. Our awardwinning lineup includes memory cards, usb flash drives, readers, ssds and storage drives for retail and oem customers.
For more than 20 years, lexar has been trusted as a leading global brand of memory solutions. Your drive must be formatted as a mac os extended journaled volume with a guid. How to make your mac boot from usb drive recoverit. Jan 16, 2020 when disk utility cant repair this disk error appears if you forget to make a backup of your external hard drive or other data drives and format it, free download minitool mac data recovery on your mac. How to start up your mac from a bootable cddvd, usb thumb. But few of them actually work as well as they advertise. The second suggestion is first aid in disk utility.
Seagate usb external drive diagnostics seagate support us. If you want to use your usb stick with an apple mac, you will need to restart or poweron the mac with the usb stick inserted while the optionalt. Jan 17, 2020 the usb drive is corrupted cannot be detected by mac. If your usb thumb drive, usbbased external disk or flash storage contains a usable operating system or an os x installer, you can select it at boot time using os xs builtin feature called startup manager, which can be invoked via a simple keystroke. How to repairfix unreadable usb flash drives on mac. Oct 15, 2019 step 5 the tool will scan the usb drive and repair usb drive errors if it can find any. You can look up for the solutions according to the cause of your problem. The upside to the smaller partition is that it gives you enough free space to update the utility. Flash drive not showing up on finder or disk utilitymac. Your macs startup drive cant be unmounted since its in use, which means you will have to start up your mac from another bootable device. For corrupt drive, you need to run your mac in safe mode to repair file system issuesthis works similar to disk utilitys first aid on the startup drive. Click on the drive icon to highlight the drive and the window will display the information about the current drive and the file system. Once data from the corrupt usb drive is rescued by using the stellar data recovery tool, open disk utility to erase the drive with apfs or hsf file system format and resolve drive corruption.
The reason why i am asking is because i usually eject my hd by dragging it to the trash icon. Developers of the program claim that the fat is the best format for usb drive to avoid conflicts with other operating systems. Have you ever tried to format a disk in mac os x and disk utility wont unmount the hard drive for formatting. How to scan a drive for errors on your mac dummies. There is a free version, but you can also upgrade the software. You can find it in the utilities folder within the applications folder. If your mac is running slowly, crashing, or just generally misbehaving, the problem may be your disk. To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your mac, or after your mac begins to restart.
Select the usb drive and click the recover button to start scanning. Tom nelson is an engineer, programmer, network manager, and computer network and systems designer who has written for other world computing,and others. Or else, use the file system consistency check fsck command in singleuser mode. How to show all drive devices in disk utility for macos. Once data from the corrupt usb drive is rescued by using the stellar data recovery tool, open disk utility. How to fix or format unreadable usb flash drive on mac. Apr 14, 2010 place it on a usb drive, boot your virusladen machine, and scan the mounted drives with clamav, antivir, bitdefender, and more. However, in order for first aid to perform any repairs, the selected volume must first be unmounted. It should have something similar to the name that shows up in disk utility indented under it in my example it doesnt step 5. My external drive is a samsung m2 portable 3 media, 500gb.
The usb drive recovery software can repair your usb drive no matter how damaged it may be. How, when, and why to repair disk permissions on your mac. Petousb free software utility,download petousb free software utility,make usb flash drive bootable,repair corrupted usb flash disk,fix,repair,usb pen drive,free software. Protogo creates a bootable mac repair toolbox with these tools as well as any of your own tools on a portable hard drive or flash drive. Run usb repair tool chkdsk utility to fix corrupted usb or pen drive. Perhaps the most popular program in any usb repair kit, hirens bootcd repairs computers from a portable device like a cd or usb drive. Here are the top reasons why the user should choose to boot mac from usb. Mac os x comes with an easytouse application, called disk utility, that allows users to verify and repair hard disks using a graphical user interface and it is recommended for most mac users that are not comfortable using the terminal.
Insert the corrupted usb or pen drive to the usb port on your pc. Diy fixrepair corrupted usb drive without formatting. Your macs startup drive cant be unmounted since its in use, which means you will have. Techtool protogo is a mac repair program suite which contains three of micromats best mac repair tools. Rightclick the icon of the usb flash drive on the desktop and click eject. To repair a disk or disk partition, you need to determine if the drive is repairable or not.
You can adjust a setting in disk utility for mac to see all device disks and drives connected to a mac. Creating a bootable mac os x usb drive, plus utilities. First, connect the usb drive and select initialize from the prompt box which will lead you to disk utility application. If your mac has a fusion drive and you see a flashing question. How to fix repair the unreadablecorrupted usb flash drive on mac.
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