How to Update Sony A1 Firmware
01
Check Your Current Firmware Version
Confirm whether your Sony A1 actually needs an update.
A1 Menu → Setup (Toolbox) → Setup Option → Version
- Note the Body firmware version
- Compare it with the latest version listed on Sony’s support website
02
Download the Latest Firmware
Required
Sony provides OS‑specific installers for macOS and Windows.
- Go to Sony Support → ILCE‑1 → Downloads
- Choose macOS or Windows firmware updater
- Save the installer to your computer
03
Prepare the Camera
The A1 must be in the correct USB mode for the updater to detect it.
go Menu → tap setup → tap USB → tap USB Connection Mode.
- Set USB Connection = Mass Storage
- Turn Airplane Mode = OFF
- Use a fully charged battery or AC adapter
- Remove the memory card (recommended)
04
Connect the Camera to Your Computer
A stable USB connection is required for the updater to communicate with the A1.
- Use the USB‑C port on the A1
- Connect directly to your computer (avoid hubs)
- Turn the camera ON
05
Run the Firmware Updater
The updater will detect your camera and begin the update process.
- Open the downloaded Sony Firmware Updater
- Follow on‑screen instructions
- Do not disconnect the camera during the update
- The camera may reboot automatically
06
Verify the Update
Make sure the firmware installed correctly.
A1 Menu → Setup → Version
- Confirm the Body version matches the latest release
- Restart the camera once more for safety
Quick Tips
- Use a fully charged NP‑FZ100 battery or AC power — losing power during update can brick the camera.
- If the updater doesn’t detect the A1, recheck USB Connection = Mass Storage.
- macOS sometimes blocks the updater; allow it under System Settings → Privacy & Security → Allow.
- Never disconnect the USB cable until the updater says the process is complete.