Disc Image Mounter Won'T Open Dmg Sierra Mac If You

To create this article, volunteer authors worked to edit and improve it over time.

You will see the.dmg file on the left of the Disk Utility screen.

In newer versions of IOS it will be located in the Images menu, located at the top left bar on your desktop.

By continuing to use our site, you agree to our cookie policy.

Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker.

If you really cant stand to see another ad again, then please consider supporting our work with a contribution to wikiHow.

Youll want to choose Disk Utility in the utilities listed in the recovery mode menu.

Recover deleted messages Decipher Backup Repair Fix broken backups that wont restore in iTunes.

Ideal for restoring a backup reported as corrupted, the iPhone disconnected, an incomplete backup, or an error occurred.

Decipher Backup Browser Export photos, notes, contacts, voice memos, or any file from your iPhone backup.

Recover deleted notes Decipher Chat Save and print WhatsApp messages, including attachments.

Decipher Messenger Export Save and print Facebook Messenger messages.

Decipher Screen Time See what apps your teen is using on their iPhone, iPad, iPod Touch and what times of day theyre using their devices.

Decipher VoiceMail Save and export your iPhone voicemail history.

Reviews FAQ Contact About Us Blog Decipher Tools Blog macOS Error Opening.dmg Disk Image - No Mountable File Systems macOS Error Opening.dmg Disk Image - No Mountable File Systems Rated (4.0 of 5.0) by 10 reviewers.

Kelly Heffner Wilkerson November 8, 2019 at 6:30 AM Categories: macOS View Comments I ran into an interesting macOS error while working with a customer a couple of weeks ago.

I didnt find a lot of good search results addressing the issue, so I decided to write up a post about it myself.

The error was as the screenshot above shows; trying to open a dmg (disk image), macOS showed the error no mountable file systems.

If you see the no mountable file systems error while opening a dmg, heres what you should try: In most cases, the downloaded dmg file is actually corrupt or had an error downloading.

If possible, try downloading the dmg again, turning off any download assistant plug-ins you may have.

You can try downloading the file in a different browser as well.

Or if you dont need to be logged in to the site to download the file and you want to be fancy, you can try curl -O url in Terminal to download the file.

Disc Image Mounter Won'T Open Dmg Sierra Mac If You

Theres an example of that in my screenshot below.) Reboot your Mac if you havent already tried that.

Apparently there is an issue sometimes after opening too many dmg files, that is fixed with a reboot.

We will at least get some sort of useful error message to go on if it still fails: Open Terminal: In Spotlight, the search magnifying glass at the upper right corner of your screen, search for Terminal, and press enter to open the Terminal app.

Drag the dmg file from your Finder window onto the Terminal window and let go.

This will fill in the location of the dmg file into your Terminal window.

So if youre on macOS Sierra (10.12) or earlier and you ran hdiutil and see references to AppleAPFS or error 112, the issue is likely legitimate incompatibility, and this disk image wont open on this Mac without an update to the operating system.

Heres an example of the end of hdiutil attach -verbose output that shows an APFS error due to an older version of macOS: Mounting.

Another suggestion added by a reader (thank you, Markus) is that filesystem errors on your main Mac drive could be the cause of the disk image mounting errors.

Here are instructions from Apple for scanning and repairing errors using Disk Utility.

Note that in order to scan and repair errors on your main Macintosh HD drive, youll need to reboot your Mac into recovery mode.

Mac Disc Image Mounter Won'T Open Dmg Sierra