Hi!
I stumbled upon this thread, because I had the exact same problem: failing installer, ‘unreadable disk’-message, missing space on a formatted card. So I also suspected a faulty SD card. However, that wasn’t the case…
I tried 3 different SD cards:
- some 8GB Micro SD hc class 4
- SanDisk 32GB micro SD ULTRA Class 10 UHS-I (hardly used)
- Samsung 32GB micro SD EVO+ Class 10 UHS-I (brand new)
With 2 different ‘setups’:
- with SD-card adapter, directly in my Mac’s SD-slot
- with SD-card reader, connected via USB
Neither of the 6 combinations worked, each setup resulted in the ‘could not mount’ error message in the installer.
But… I managed to setup OSMC (for RPi 2b) by doing a manual installation.
I couldn’t find a compact and complete howto, so I’ll share the steps and info here.
manual installation
- format the SD with ‘SD Card Formatter’: SD Memory Card Formatter for Windows/Mac | SD Association
- option: ‘Overwrite format’
- file system should be FAT32 after formatting (it looks like the formatter-tool does that by default)
If it’s not FAT32, you can format your SD commandline (didn’t need to do this myself):
diskutil list
find the location, e.g. /dev/disk2
sudo diskutil eraseDisk FAT32 MYSDCARD MBRFormat /dev/disk2
- now download the disk-image on Download - OSMC
- be sure to pick the correct one! (in my case the Raspberry Pi 2 / 3 version, otherwise your Pi will be stuck on the rainbow-bootscreen. Trust me, I know )
- I used Etcher https://etcher.io/ to burn the image to the SD card
- Plug in the SD-card in your Pi and complete the setup!
I hope this info can be helpful to other users with the same issue.
By the way, I used the installer about a year ago on the 8GB card and it worked like a charm then. So it looks to me like it’s a problem with this version of the installer.