Why isn't my M4 or M5 MacBook going into DFU mode?
If you've put a MacBook into DFU mode dozens of times without trouble and suddenly your new M4 or M5 machine refuses to cooperate, you're not doing anything wrong. Apple quietly changed the DFU port location on the newest MacBooks, and unless you know about it, you'll spend a frustrating afternoon repeating the key combo over and over while nothing appears on the host Mac.
Here's what changed, why it matters, and how to actually get these machines into DFU mode.
The short answer
On the 14-inch MacBook Pro with the M4 or M5 chip (not the Pro or Max variants) and the MacBook Air M4 and M5, the DFU port is the rightmost USB-C port on the left side of the Mac.
On every other Apple silicon MacBook before these, it was the leftmost USB-C port on the left side.
If you're plugging into the port you've always used and the host Mac shows nothing, that's almost certainly the problem. Move the cable one port to the right and try again.
Why the change is so easy to miss
The two USB-C ports on the left side of these MacBooks look identical. There's no label, no icon, no indicator light, no visual cue at all to tell you which one is the DFU port. The only way to know is to check Apple's documentation and even then, the change is buried inside a single line of a table on a support page most people only read once and then never revisit.
For years, the rule of thumb among Mac technicians and IT admins was simple: Apple silicon MacBook = leftmost port. T2 MacBooks used the rightmost port. That rule has now broken, but only for some models.
It's worth being precise about which machines are affected, because Apple has been inconsistent:
- 14-inch MacBook Pro with M4 or M5 (base chip): rightmost port
- 14-inch MacBook Pro with M4 Pro, M4 Max, M5 Pro, M5 Max: leftmost port
- 16-inch MacBook Pro (all M4/M5 variants): leftmost port
- MacBook Air with M4 or M5: rightmost port
- MacBook Air M1 through M3: leftmost port
So within the same product line, two MacBook Pros sitting next to each other on a desk can have their DFU ports in different physical locations depending on which chip they have.
Why this is a real problem for fleet deployment
If you're using Apple Configurator with a IPSW files to image Macs at scale, onboarding new staff or refreshing old devices, the workflow has historically depended on the port being predictable. You hand a technician a cable and a host Mac, you tell them "left port, hold the keys, watch for DFU," and they image multiple MacBooks in an afternoon without thinking about it.
That assumption is now broken:
You can't tell by looking. A stack of identical looking 14-inch MacBook Pros may include both M4 base models and M4 Pro models. The base ones need the rightmost port, the Pros need the leftmost. There's no way to distinguish them other than checking the model number on the base of the MacBook.
The "always leftmost" muscle memory leads to silent failure. When DFU mode doesn't engage, you don't get an error. You get nothing a blank screen on the affected Mac and an empty Finder window on the host.
Documentation on many websites and blogs hasn't been updated. Only if you find the Apple page on DFU, which is not easy to find, would you know this.
How to actually enter DFU mode on an M4 or M5 MacBook
Assuming you've now got the cable in the correct port, here's the full procedure.
You'll need:
- A second Mac running macOS Sonoma 14 or later
- A USB-C to USB-C cable that supports data and charging (the Apple USB-C Charge Cable is fine)
- Both Macs connected to power throughout
Steps:
- On the affected MacBook, plug the USB-C cable into the rightmost USB-C port on the left side (for M4/M5 base 14-inch MacBook Pro or M4/M5 MacBook Air). If your Mac has MagSafe, power it via MagSafe so both USB-C ports stay free.
- Plug the other end into any USB-C port on the host Mac.
- Press and hold the power (Touch ID) button on the affected MacBook for up to 10 seconds until it turns off. If it turns on instead, repeat.
- Press and release the power button.
- Immediately press and hold all four of these together:
- Control (left side of the keyboard)
- Option (left side)
- Shift (right side)
- Power button
- Hold all four for about 10 seconds, then release everything except the power button.
- Keep holding the power button for up to another 10 more seconds, until the DFU window appears in the Finder on the host Mac.
The screen on the affected MacBook stays blank the entire time. That's expected you're watching the host Mac for confirmation (DFU Logo), not the one being revived.
The bigger picture
It's reasonable to ask why Apple changed this. The most likely answer is that the internal board layout on the redesigned M4 and M5 base models simply put the DFU-capable controller on a different physical port. From a hardware engineering perspective it's a minor detail; from a deployment perspective it's the kind of small change that costs the global IT community a measurable amount of collective time before everyone figures this out. For the average user looking to DFU their device, the information about which port to use isn't easy to find on Apple's website, and most other articles simply state that the DFU port on Apple silicon devices is the leftmost port on the left.
FAQ
Which port is the DFU port on my M4 MacBook Pro?
On the 14-inch MacBook Pro with the base M4 chip, it's the rightmost USB-C port on the left side. On the 14-inch MacBook Pro with M4 Pro or M4 Max, and on every 16-inch M4 MacBook Pro, it's still the leftmost USB-C port on the left side. The same split applies to M5 models.
The screen on my MacBook is completely black during DFU mode. Is something wrong?
No, that's correct behaviour. A Mac in DFU mode shows nothing on its own display, the screen stays blank throughout the process. You're watching the host Mac for the DFU window to appear in Finder or in Apple Configurator. If you see anything on the affected Mac (Apple logo, login screen, anything at all), you're not actually in DFU mode and need to restart the procedure.
