> Up­dated driver causes crashes


I re­cently up­dated sup­port for myCanon Pixma PRO-1 prin­ter. Fol­low­ing that, when print­ing a photo at high qual­ity, the prin­ter soft­ware crashed and the prin­ter was un­re­spon­sive. I can’t un­der­stand much of the crash re­port’s con­tents, but it refers to EXC _BA D_ACC ESS (SIGSEGV). How can I fix it?

That generic er­ror mes­sage usu­ally in­di­cates that the prin­ter soft­ware is bro­ken. Af­ter an up­date, it shows that failed, ei­ther be­cause the up­date didn’t in­stall prop­erly, or be­cause there’s a bug in the new ver­sion.

The first thing to do is to check that your Pixma PRO-1 prin­ter’s firmware is v2.000 or later; if not, up­date it us­ing Canon’s Prin­ter Up­date Util­ity. Then unin­stall it from the Print­ers & Scan­ners pane.

Choose be­tween in­stalling ver­sion of the prin­ter driver from Canon, or leav­ing macOS to in­stall its lat­est re­lease. Nor­mally you’re bet­ter off re­ly­ing on macOS, but for this model you may find the Canon-sup­plied driver sup­ports higher qual­ity out­put.

If that still doesn’t work prop­erly, in­stall the pre­vi­ous driver if you hap­pen to have a copy to hand. If you don’t, check with Canon, which should still be able to sup­ply it.

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