"I can scan and copy but the printer won't print"に関する回答Hi, I had the same problem with my MFC-J5625DW and a previous printer MFC-J5910DW, with both these printing up to A3. I don't know why, but both suddenly stopped printing from my MacBook Pro, but would print from my Windows 10. I then noticed that when trying to print from the Mac, the small screen on the printer was indicating paper feed mismatch at the rear sheet feeder and not the inbuilt tray. This is where I feed A3 paper which led me to check the printer default paper size and found it to be set at A3. After changing it back to A4 and testing, it worked fine. Although the problem was solved, I still don't know why the printer settings changed in the first place. Hope that helps.