diff --git a/README.md b/README.md
index baa652c4c9a7994f5a6b3f0abea3fd773886ead4..415ee18287b95089b122cc188d93c423c78497f3 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ The black hole can be configured with `set black_hole lat lon radius_meters`. Fo
 
 Note that you probably don't want to center your black hole exactly on your house. It may be possible to work out its position based on when exactly you stop transmitting. Instead, you should configure the black hole to overlap with your house, without being centered.
 
-## Updating firmware (Linux only)
+## Updating firmware (Linux)
 
 **NOTE:** Currently, updating the firmware can only be done on Linux. If you don't have a Linux computer, a Raspberry Pi, Virtual Machine, or Live-booted distro can be used.
 
@@ -61,6 +61,26 @@ sudo ./flasher-linux
 ```
 3. Follow the instructions on the screen. Afterwards, the board will restart automatically.
 
+## Updating firmware (Mac)
+1. Install dependencies
+```bash
+brew install arm-none-eabi-gcc
+brew install dfu-util
+```
+2. Download the firmware binary from [here](https://gitlab.scd31.com/cats/mobile-transceiver-software/builds/artifacts/master/browse/?job=build)
+3. Put the transceiver into firmware flashing mode:
+    1. Connect the board to your computer via USB
+    2. Hold down the `flash` button
+    3. Press the `reset` button
+    4. Release the `flash` button
+    5. The red LED will come on, then go off. If it stays on, it means your computer isn’t communicating with the board for some reason. Check your cable!
+4. Flash the firmware:
+```bash
+arm-none-eabi-objcopy -O binary firmware.bin firmware_actual.bin
+/opt/homebrew/bin/dfu-util -l # find serial
+/opt/homebrew/bin/dfu-util --dfuse-address 0x08000000 -S SERIAL_NUMBER_GOES_HERE -a 0 -D firmware_actual.bin
+```
+
 ## Compiling firmware from source (Linux only)
 
 ### Environment setup