I had to install the driver on a new MacBook. The pkg file requires right-clicking and selecting 'open' vs double click. Then, the dialogue says installation has failed. However, under Settings->Printer, the IP100 shows and prints successfully.
This was helpful. Thanks. I tried to install the printer driver and got an error message. But after a couple of failed tries, I followed the suggestion and was able to add my ip100 in the Systems Settings. Something mysterious is going on.
