DYMO LabelWriter on a Mac: the 4XL, the 5XL, and the RFID lockout

DYMO is the one brand in this class where the important decision is not about drivers at all. It is about which generation you own, because the newer one decides what you are allowed to put in it.

The RFID lockout, and why it matters before you buy

The LabelWriter 550 series, which includes the 5XL, reads an RFID chip embedded in the label roll. The printer checks that chip and refuses to print without one it recognises, showing “Genuine DYMO labels required” or “Unknown label detected”.

That means, concretely:

• Third-party 4x6 rolls do not work. Not badly — at all.
• Older non-RFID DYMO rolls do not work either, so stock bought for a previous machine is stranded.
• A genuine roll can still fail if the chip is damaged or the roll is seated where the reader cannot see it — worth re-seating before concluding the labels are fake.

The LabelWriter 4XL predates all of this and prints ordinary third-party 4x6 rolls. If you already own one, that is a real reason to keep it rather than upgrade.

Whether the lockout is acceptable is a running-cost question, not a technical one. DYMO rolls cost more per label than generic 4x6 stock, and with a 550-series printer that difference is permanent — you cannot shop around later.

Setting up on macOS

1. Download the macOS driver from DYMO's own support downloads for your model.
2. Open the .dmg and run the installer. If macOS blocks it, go to System Settings → Privacy & Security and click Open Anyway.
3. Add the printer under Printers & Scanners.
4. Set its default paper size to the 4 × 6 label.

DYMO Connect installs alongside the driver. It is a label designer, and for carrier labels you do not need it — once the driver is in, macOS treats the printer like any other and you can print the PDF directly.

When it prints, but not at the right size

Once the roll is accepted and the printer is installed, a wrong-sized label is a file problem. Check the PDF with Cmd+I in Preview:

• 100 × 150 mm — correct. Set paper size to the 4 × 6 label and scale to 100%.
• 210 × 297 mm or 8.5 × 11 in — a full page with the label in a corner. No print setting fixes it; the page has to be cut down first.

For a label that arrived as a full page, our free browser tool cuts it down to the label alone in the browser — no upload, and no rescaling of the barcode.

Choosing between them

If you are buying now and postage labels are the job, the honest comparison is not 4XL against 5XL — it is DYMO against the plain 4x6 thermal printers. A Rollo needs no driver and takes any 4x6 stock; MUNBYN and Xprinter cost less again and take any stock too.

DYMO earns its place if you are already inside that ecosystem, or want one machine that also does address and barcode labels well. It is a harder case to make purely for shipping, given what the 550 series commits you to buying afterwards.