By Graham K. Rogers

Yesterday I reported on an apparently minor problems with an update to the AutocDesk 123 Design app for the Mac. A panel reported that the "Preflight file" had not been signed by Apple so could not be downloaded.

At the office later, I tried again and the update had disappeared: I thought that a fix was on the way. No such luck.

Once more, checking the App Store for updates this morning, the update appeared, but when I clicked on it, the same panel appeared and we are back to square one.

Graham K. Rogers teaches at the Faculty of Engineering, Mahidol University in Thailand. He wrote in the Bangkok Post, Database supplement on IT subjects. For the last seven years of Database he wrote a column on Apple and Macs. He is now continuing that in the Bangkok Post supplement, Life.