macOS Big Sur with Canon LBP2900B Printer

First you have to delete all your LBP 3000 printers form your Mac and then restart.

After that download latest CAPT driver for LBP3000 from the link below and download 2900 patch as well.

Now install latest CAPT driver for LBP3000 in your Mac and then put patch files in BIDI and cnaccm folder respectively.

Now open terminal and write the code " xattr -cr**** " and press enter.

After that connect your printer to your Mac and add printer in system preference there you go have fun.

link for latest CAPT driver for LBP3000:- https://www.canon.com.au/laser-printers/laser-shot-lbp3000/support?option=drivers

link for patch file for LBP2900:- http://raboninco.com/Ju5

Go to folder address for patch files:- /Library/Printers/Canon/CUPSCAPT2/Bidi ( captmoncnab3 )

/Library/Printers/Canon/CUPSCAPT2/cnaccm ( CnAC28B9.DAT )

**** = pathname for file "captmoncnab3"in Bidi folder you can get the same using right click and then by holding option button.

Go to the folder Applications -> Utilities. Open the Terminal.app

Paste the command xattr -cr /Library/Printers/Canon/CUPSCAPT2/Bidi/captmoncnab3 and Press Enter. Refer the screenshots attached.

Follow those tips above, remember to run xattr -cr ,

AND for me it needed a direct connection to my iMac - not through usb hub!

Worked for me after I connected printer straight to usb slot in iMac, not before.

I think, 11.3 compatible driver is not released yet for LBP3000.

Try the latest one from this link, which is for 11.2.1

https://www.canon.com.au/laser-printers/laser-shot-lbp3000/support?option=drivers

Run this command in Terminal.

xattr -cr /Library/Printers/Canon/CUPSCAPT2/Bidi/captmoncnab3

link for latest CAPT driver for LBP3000:- https://www.canon.com.au/laser-printers/laser-shot-lbp3000/support?option=drivers

link for patch file for LBP2900:- https://drive.google.com/file/d/1HpblvIo-NGr0a-nmrlnhEgP3S_9Rl5aF/view

The current software MacODBIGSUR 11.3.1 is not compatible with lbp2900b, So it my advice to change the printer.

YESSS! Finally I made it work on Big Sur 11.3, my printer is alive again!

I had ordered a new laserprinter a couple a weeks ago, but today it was delayed the second time. So for the 30th time I think, I tried to make my LBP2900 work. This time, I found out that the patch-file I had used was NOT a execfile, but a document with the same name. I dont know why this had occured, but I tried the steps again, first without deleting the printerfile in Library/Printers/Canon, not working. Tried again. Deleting the printer in "printers and scanners", deleting the Canon-driver in Library/Printers, restart, downloading and installing the driver, replacing the pathes, wrote the terminalcommand, connected the printer to my iMac, added it in system preferences, and tried to print. And it printed! What a feeling :)

https://noobztech.blogspot.com/2021/03/fix-tech.html

this includes a clear step by step process

Don't waste time installing updated software. I had tried many times but all in vain. So its better to update new printer.

I just did the following steps,

Removed the existing printer in preferences.

Installed the new driver.

Replaced the patch files.

Executed the xattr command.

Added the printer in preferences.

It worked.

I've tried to open and get this message -“captmoncnab3” is damaged and can’t be opened.