etcher fails to unmount

Hello Volume,

I am trying to flash the latest volumio on a Sandisk 128 gb ultra sd card(the only sd card i have, Fat32).
Etcher fails at the finishing… stage. The error log shows…

{ Error: Command failed: env ELECTRON_RUN_AS_NODE=1 ETCHER_INTERNAL_LOG_FILE=/var/folders/1n/qxpngdq54w12dgcfnlsps80c0000gn/T/etcher-1073IrFWRrXKGIx9.log /Applications/Etcher.app/Contents/Frameworks/Etcher\ Helper.app/Contents/MacOS/Etcher\ Helper /Applications/Etcher.app/Contents/Resources/app.asar/lib/src/child-writer/writer-proxy.js /Applications/Etcher.app/Contents/Resources/app.asar /Users/amal/Downloads/volumio-0.976-2016-07-28-pi.img --robot --drive /dev/disk2 --unmount --check --log /var/folders/1n/qxpngdq54w12dgcfnlsps80c0000gn/T/etcher-1073IrFWRrXKGIx9.log at /Applications/Etcher.app/Contents/Resources/app.asar/node_modules/sudo-prompt/index.js:328:27 at tryToString (fs.js:449:3) at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:436:12) cause: Error: Command failed: env ELECTRON_RUN_AS_NODE=1 ETCHER_INTERNAL_LOG_FILE=/var/folders/1n/qxpngdq54w12dgcfnlsps80c0000gn/T/etcher-1073IrFWRrXKGIx9.log /Applications/Etcher.app/Contents/Frameworks/Etcher\ Helper.app/Contents/MacOS/Etcher\ Helper /Applications/Etcher.app/Contents/Resources/app.asar/lib/src/child-writer/writer-proxy.js /Applications/Etcher.app/Contents/Resources

is there any other way i can accomplish the same. dd may be?

/Amit