Reboot your Mac if you haven't already tried that. (There's an example of that in my screenshot below.) Or if you don't 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. You can try downloading the file in a different browser as well. If possible, try downloading the dmg again, turning off any download assistant plug-ins you may have. In most cases, the downloaded dmg file is actually corrupt or had an error downloading. If you see the "no mountable file systems error" while opening a dmg, here's what you should try: The error was as the screenshot above shows trying to open a dmg (disk image), macOS showed the error "no mountable file systems". I didn't find a lot of good search results addressing the issue, so I decided to write up a post about it myself. Thanks for your help.I ran into an interesting macOS error while working with a customer.
So if I wanted to cooy 100GB to a disk image it would take over a week? Is this a Mountain Lion/Lion bug or glitch or do I just have the wrong settings. Like what is it doing that it takes 24 hours to copy 15 GB? Someone please explain this process.especially because it uses so little computer resources.
I looked at CPU usage and the disk image related programs use like 4% max.? Is there any way I can ramp that up to 80% or something to speed this up? I feel like it was a lot faster in Snow Lepord.?Ĭan someone please explain why it takes 4 minutes to download a 1GB file, like 4 minutes to move a 15GB file, not much time to copy the 15GB to external HDD over USB 3.0, but 24 hours to copy files to something on the same physical, internal drive? So I tried all the different settings: sprase bundle, read/write, encrypted, all took about a day. While I'd expert it to go a bit slower because it's encrypted I was surprised by how slow it went. In Mountain Lion copying a folder containing only 15GB worth of files to a 128 AES encrypted sparse disk image takes over 24 hours!
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