Techtool protogo is a mac repair program suite which contains three of micromats best mac repair tools. Best bootable utility tools kit iso for usb flash drive or. Repair this unmountable external hard drive with first aid. If that doesnt work, back up as much of your data as possible, reformat the disk, reinstall macos, then restore your backedup data.
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. There is a free version, but you can also upgrade the software. If your usb drive is seriously broken by hitting, dropping, shaking, etc. Best usb format tools pen drive stick formatters for. 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. Using techtool pro to test and repair your drive micromat inc. Your drive must be formatted as a mac os extended journaled volume with a guid. Download free usb flashpen drive repair tool and recover data. Then i got the dreaded message disk utility stopped repairing macintosh hd disk utility cant repair this disk. To make flash drive show up on mac again, we have collected seven useful methods. How to fix external hard drive not mounting on mac computer. However, in order for first aid to perform any repairs, the selected volume must first be unmounted. For more than 20 years, lexar has been trusted as a leading global brand of memory solutions. 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.
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. 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. Back up as many of your files as possible, reformat the disk, and restore your backedup files. Apr 16, 2020 to recover deleted files from a usb drive on mac. Repair a storage device in disk utility on mac apple support.
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. We collected several fixes for you to try and make your usb flash drive detected by mac computer. Your macs startup drive cant be unmounted since its in use, which means you will have. 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. I might have accidentally disconnected the hard drive without ejecting it first. Tom nelson is an engineer, programmer, network manager, and computer network and systems designer who has written for other world computing,and others. This can be a hard drive, a solidstate drive ssd, a thumb drive, or a usb stickan 8gb thumb drive is perfect.
How to show all drive devices in disk utility for macos. 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. 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. 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. Now when i run disk utility and click repair disk it says. The reason why i am asking is because i usually eject my hd by dragging it to the trash icon. To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your mac. 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.
The usb drive is corrupted cannot be detected by mac. Developers of the program claim that the fat is the best format for usb drive to avoid conflicts with other operating systems. The upside to the smaller partition is that it gives you enough free space to update the utility. The second suggestion is first aid in disk utility. First, connect the usb drive and select initialize from the prompt box which will lead you to disk utility application. 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. You can look up for the solutions according to the cause of your problem. To repair the usb drive we will use the chkdsk utility within command prompt.
In this case, you need to send it to a local data recovery service. Both solid state and rotational hard drives can be the most errorprone components in your mac. Download free usb flashpen drive repair tool and recover. Users would have to configure their usb to recognize an iso file. It also helps to repair the mac disk with disk utility and other tools. It provides the user access to contents of the internal drive, assuming the data is safe and not corrupted. Our awardwinning lineup includes memory cards, usb flash drives, readers, ssds and storage drives for retail and oem customers. Repair your macs drives with disk utilitys first aid. Have you ever tried to format a disk in mac os x and disk utility wont unmount the hard drive for formatting. How to recover data from damaged mac or external drive. How to force a hard drive to unmount for formatting in mac os. How to repairfix unreadable usb flash drives on mac.
Use first aid to repair usb drives mac allows the user to fix external drives related problems via disk utility. 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. Or else, use the file system consistency check fsck command in singleuser mode. If your mac is running slowly, crashing, or just generally misbehaving, the problem may be your disk. How to recover deleted files from a usb flash drive on mac. Feb 29, 2016 today i am showing how to make a boot able usb drive for mac using a. It can happen for external usb and firewire as well as internal disks. Place it on a usb drive, boot your virusladen machine, and scan the mounted drives with clamav, antivir, bitdefender, and more. 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. First aid has the ability to fix unreadable usb flash drive error.
If your mac has a fusion drive and you see a flashing question. Free usb repair tool to repair flash drive and recover data. Using from an external source like the usb drive helps the user get around the problem. 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. Select the usb drive and click the recover button to start scanning. Disk utilitys first aid is your first choice to repair usb flash drive, pen drive, and other external drives on mac. 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. Diy fixrepair corrupted usb drive without formatting. This will launch apples startup manager which shows bootable devices connected to the machine. Let the scan process complete, then close the scan window.
How, when, and why to repair disk permissions on your mac. 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. Nov 19, 2019 you can use disk utilitys first aid on your macs startup drive. Once data from the corrupt usb drive is rescued by using the stellar data recovery tool, open disk utility. Click recover to restore the files to a designated location. My external drive is a samsung m2 portable 3 media, 500gb.
Jan 17, 2020 the usb drive is corrupted cannot be detected by mac. Apr 01, 2020 mac startup key combinations learn about the mac features and tools that you can access by holding down one or more keys during startup. 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. Apr 14, 2010 place it on a usb drive, boot your virusladen machine, and scan the mounted drives with clamav, antivir, bitdefender, and more. You can adjust a setting in disk utility for mac to see all device disks and drives connected to a mac. The program is able to format and repair usb flash drives under windows 7, windows 10 and earlier versions of the os. Run usb repair tool chkdsk utility to fix corrupted usb or pen drive. How to use your macs disk utility to partition, wipe, repair. Click on the drive icon to highlight the drive and the window will display the information about the current drive and the file system. Most of people when they format or open their flash. If a hard drive is acting up, disk utilitys first aid function is the first thing you should try.
How to make your mac boot from usb drive recoverit. Rightclick the icon of the usb flash drive on the desktop and click eject. Making bootable usb of mac os x with disk utility youtube. Disk utility cant repair external hard drive macrumors forums. How to scan a drive for errors on your mac dummies. Even though i did it, my mac claims that it wasnt eject properly. How to fix repair the unreadablecorrupted usb flash drive on mac. Open terminal in the same place as disk utility and type in diskutil list and locate your drive. 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. Seagate usb external drive diagnostics seagate support us. Reparieren eines speichermediums im festplattendienstprogramm. How to start up your mac from a bootable cddvd, usb thumb.
First aid on recovery mode can serve as a computer flash drive repair tool on mac. Perhaps the most popular program in any usb repair kit, hirens bootcd repairs computers from a portable device like a cd or usb drive. The usb flash drive recovery for mac features a friendly, spontaneous interface, making it the best usb drive repair software for mac operating systems. Flash drive not showing up on finder or disk utilitymac. Here are the top reasons why the user should choose to boot mac from usb. Techtool pro 8, techtool pro classic, and diskstudio. How to fix or format unreadable usb flash drive on 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. Step 5 the tool will scan the usb drive and repair usb drive errors if it can find any. Creating a bootable mac os x usb drive, plus utilities. Open disk utility it is in applicationsutilities and click new image with. Press enter, cmd will correct all pny flash drive errors without formatting.
There is also an alternative that does not use the command line that is shown below. But few of them actually work as well as they advertise. You can use disk utilitys first aid on your macs startup drive. It will not affect the performance of the flash drive. Oct 15, 2019 step 5 the tool will scan the usb drive and repair usb drive errors if it can find any. Sep 14, 2015 how to start up your mac from an external usb storage device.
Mac startup key combinations learn about the mac features and tools that you can access by holding down one or more keys during startup. Repair mac external hard drive without disk utility mac. Fix corrupted flash disk with petousb utility flash drive. How to start up your mac from an external usb storage device. From launchpad, click the utilities folder and then click the disk. Or you can just open disk utility by finder applications utility. This feature checks the file system for errors and attempts to correct them, all without much intervention from you. 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 repair a disk on mac os x from command line.
The usb drive recovery software can repair your usb drive no matter how damaged it may be. Insert the corrupted usb or pen drive to the usb port on your pc. Fix usb corrupt partition map on macos kepler donald medium. 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. You can find it in the utilities folder within the applications folder. Today i am showing how to make a boot able usb drive for mac using a. The boot cd is a collection of different free and legal software designed to solve different computerrelated problems.