Replace disk1 with your Disk Identifier value.Assuming that your microSD card’s Disk Identifier value is disk1, you will use the following code in Terminal to format your disk to the FAT16 file format: sudo newfs_msdos -F 16 /dev/disk1.This will format your microSD card so that that it contains no data. In the window that appears, type in the code outlined in step 4 and press Enter on your keyboard. In Search, type in Terminal and select the Terminal app that appears in the search results.You can do this by pressing cmd and I on your keyboard, and locating the Disk Identifier Make note of the value for the next step or leave it as it has already been copied with the CMD I command. Locate your microSD card, highlight it and copy the drive’s ID.This will show you all drives and volumes connected to your Mac. Select Disk Utility which will appear in the search results and wait for the window to open. Click the magnifying glass on the top right-hand side of your screen and in the search bar that appears, type in Disk Utility.You can also highlight all these files, and drag them to your desktop. You can press cmd and X on your keyboard to cut the files, and then use the cmd and V combination to move the files to another area on your Mac. You can do this by going to Finder, locating your microSD card and highlighting the files within the disk. To start, backup any files you currently have on your microSD card to ensure that you lose no files. The following method explains the simplest method to resolve the issue and use your microSD card as a rewritable disk. It is possible to resolve this problem – so long as the adapter is not corrupt – using no third party software. (It does this for the volume and also for the higher level Apple SD Card Reader Media)

The permissions panel tells me that I can only read.ĭisk utility tells me it’s not writable. ‘Get Info’ tells me the drive is formatted to FAT16. This means that the user will be unable to transfer from their PC to the disk. Using a microSD card in an adapter slot, where the physical lock slider is placed in an unlocked position, some users have reported that the drive is formatted to FAT16, but that Disk Utility claims it is not writable (and vise-versa). Using macOS, some users have experienced difficulty making microSD cards writable.

How to format sd card to fat16