It's a known issue with Apple's Preview that it does not render the barcodes correctly in PAHT tickets.
I had heard that there was a fix in 9.0.0.1, looking in the patch's docs, there's a whole new section to the web.config dedicated to this issue. " Normal 0 false false false MicrosoftInternetExplorer4 Print At Home Ticketing Font Node Additions"
Which contains a list of accepted fonts, but wait, where is the barcode font? That's the problem isn't it?
Normal 0 false false false MicrosoftInternetExplorer4
Accepted Fonts:
TimesRoman
TimesBold
TimesItalic
TimesBoldItalic
Helvetica
HelveticaBold
HelveticaOblique
HelveticaBoldOblique
Courier
CourierBold
CourierOblique
CourierBoldOblique
Symbol
ZapfDingbats
HeiseiKakuGothicW5
HeiseiMinchoW3
HanyangSystemsGothicMedium
HanyangSystemsShinMyeongJoMedium
MonotypeHeiMedium
MonotypeSungLight
SinoTypeSongLight
CeTeBullets