app file, as the files were viewed on my old iMac. When I fetched the files from Dropbox, there was no runnable.

dmg with no problems, and run the loader without difficulty. I had a friend with a recent version of MacOS he was able to open the. dmg from the command line (terminal window), with no success. dmg format that is incompatible with MacOS 10.12 and earlier. I investigated this error message the most useful information I found was at:

I've been tr.ying to get the teensy_loader program installed on my old iMac, that is running MacOS 10.10.5.Īfter downloading the teensy.dmg file from, attempts to mount the disk image fail, with the message 'no mountable file system'.