# Electron stuck in boot loader **URL:** \ **Category:** Troubleshooting\ **Created:** [March 15, 2016, 3:02am UTC](https://community.particle.io/t/electron-stuck-in-boot-loader/21076 "2016-03-15T03:02:02Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![n4mho](https://avatars.discourse-cdn.com/v4/letter/n/50afbb/32.png) [@n4mho](https://community.particle.io/u/n4mho)\ **Post date:** [March 15, 2016, 3:02am UTC](https://community.particle.io/t/electron-stuck-in-boot-loader/21076/1 "2016-03-15T03:02:02Z")
After loading particle-cli and dfu-util on OS X Yosemite, I attempted to flash my Electron through USB. It recognized the device and claimed that it completed successfully, but it does not exit boot loader mode. I’ve tried pressing reset and reloading Tinker. Tinker was not in /usr/local/ but I pulled down a copy of electron\_tinker.bin from Github and used that. It programmed that successfully but still does not exit boot loader mode. The output that I get from dfu-util -l is here: Apollo:Blink-LEDs n4mho$ dfu-util -l dfu-util 0.9 Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. Copyright 2010-2016 Tormod Volden and Stefan Schmidt This program is Free Software and has ABSOLUTELY NO WARRANTY Please report bugs to [http://sourceforge.net/p/dfu-util/tickets/](http://sourceforge.net/p/dfu-util/tickets/) Deducing device DFU version from functional descriptor length Found Runtime: [05ac:828a] ver=0112, devnum=7, cfg=1, intf=3, path=“29-1.8.1.3”, alt=0, name=“UNKNOWN”, serial=“UNKNOWN" Found DFU: [2b04:d00a] ver=0200, devnum=5, cfg=1, intf=0, path=“20-4”, alt=1, name=”@DCT Flash /0x00000000/01_016Kg", serial=“00000000010C" Found DFU: [2b04:d00a] ver=0200, devnum=5, cfg=1, intf=0, path=“20-4”, alt=0, name=”@Internal Flash /0x08000000/03_016Ka,01_016Kg,01_064Kg,07\*128Kg", serial=“00000000010C” Also from loading Tinker: Apollo:Blink-LEDs n4mho$ particle flash --usb electron\_tinker.bin Found DFU device 2b04:d00a checking file electron\_tinker.bin spawning dfu-util -d 2b04:d00a -a 0 -i 0 -s 0x08020000:leave -D electron\_tinker.bin dfu-util 0.9 Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. Copyright 2010-2016 Tormod Volden and Stefan Schmidt This program is Free Software and has ABSOLUTELY NO WARRANTY Please report bugs to [http://sourceforge.net/p/dfu-util/tickets/](http://sourceforge.net/p/dfu-util/tickets/) dfu-util: Invalid DFU suffix signature dfu-util: A valid DFU suffix will be required in a future dfu-util release!!! Deducing device DFU version from functional descriptor length Opening DFU capable USB device… ID 2b04:d00a Run-time device DFU version 011a Claiming USB DFU Interface… Setting Alternate Setting #0 … Determining device status: state = dfuIDLE, status = 0 dfuIDLE, continuing DFU mode device DFU version 011a Device returned transfer size 4096 DfuSe interface name: "Internal Flash " Downloading to address = 0x08020000, size = 5776 Download [=========================] 100% 5776 bytes Download done. File downloaded successfully Flash success! Suggestions? ---
**Author:** ![mdma](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/mdma/32/1924_2.png) [@mdma](https://community.particle.io/u/mdma)\ **Post date:** [March 15, 2016, 4:28am UTC](https://community.particle.io/t/electron-stuck-in-boot-loader/21076/2 "2016-03-15T04:28:16Z")
The CLI has written application firmware to the system firmware region. I’m guessing you’re using an old version of the cli? Be sure your CLI is up to date by running `npm install -g particle-cli`, and then update system firmware via `particle update`. ---
**Author:** ![n4mho](https://avatars.discourse-cdn.com/v4/letter/n/50afbb/32.png) [@n4mho](https://community.particle.io/u/n4mho)\ **Post date:** [March 16, 2016, 12:26am UTC](https://community.particle.io/t/electron-stuck-in-boot-loader/21076/3 "2016-03-16T00:26:19Z")
The version before and after running the update is 1.8.3. particle update returns this: “There are currently no system firmware updates available for this device.” ---
**Author:** ![n4mho](https://avatars.discourse-cdn.com/v4/letter/n/50afbb/32.png) [@n4mho](https://community.particle.io/u/n4mho)\ **Post date:** [March 16, 2016, 1:23am UTC](https://community.particle.io/t/electron-stuck-in-boot-loader/21076/4 "2016-03-16T01:23:02Z")
Repeated the process on a Windows 10 PC and the version of particle-cli installed was 1.11.0. The system firmware process worked as well. How to get the Mac version of npm to fetch something newer than 1.8.3? Thanks, Mike ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [March 16, 2016, 1:38am UTC](https://community.particle.io/t/electron-stuck-in-boot-loader/21076/5 "2016-03-16T01:38:11Z")
`npm update -g particle-cli` should work well ---
**Author:** ![n4mho](https://avatars.discourse-cdn.com/v4/letter/n/50afbb/32.png) [@n4mho](https://community.particle.io/u/n4mho)\ **Post date:** [March 16, 2016, 3:11am UTC](https://community.particle.io/t/electron-stuck-in-boot-loader/21076/6 "2016-03-16T03:11:08Z")
No, tried, but it doesn’t change it. Previously, I had deleted particle-cli a couple of times and reinstalled, with version 1.8.3 downloaded each time. ---
**Author:** ![kennethlimcp](https://avatars.discourse-cdn.com/v4/letter/k/c0e974/32.png) [@kennethlimcp](https://community.particle.io/u/kennethlimcp)\ **Post date:** [March 16, 2016, 3:22am UTC](https://community.particle.io/t/electron-stuck-in-boot-loader/21076/7 "2016-03-16T03:22:33Z")
You can try `npm install -g particle-cli@1.11.0` and see how things go