Hi Cathy, A few more details about Gatekeeper. In Mountain Lion, as a security precaution, Apple instituted a process by which application developers could get a certificate they would use to "sign" their software to indicate that they certify it to be free from malware. All software from the Mac App Store is signed this way. Third party software that you download may, or may not be "signed". Older third party software, even widely used and accepted products such as VueScan, will probably not be signed. This means that in order to proceed with installing such software on your system, you either have to knowingly temporarily disable Gatekeeper, or else use the "open" dialog from the context menu, as Josh indicated, to indicate that you're aware that you want to override the automatic warning that the software you've downloaded is not signed.
Someone installing the same software on an older version of Mac OS X would not receive this warning. I think that Gatekeeper was actually activated in the last version release of Lion (OS X 10.7), but not in the earlier versions. I'm just giving you this explanation because you are likely to encounter this when you try to install other software. HTH. Cheers, Esther On Apr 15, 2013, at 1:55 PM, Josh Gregory wrote: > That is gatekeeper, in order to open the file, do a voiceover shift m on it > and go to open. > > Sent from my iPhone > > On Apr 15, 2013, at 7:07 PM, Cathy <flowersandhe...@gmail.com> wrote: > >> hello >> I am having difficulty installing vuescan on my Mac. the message I get is: >> >> can't open because it is from an unidentified developer. >> >> please let me know how to allow the file to open? >> >> also, I'd like some recommendations for an inexpensive scanner from Amazon >> to go along with the vuescan. >> I have two scanners that I have tried and my Mac will not recognize them. >> perhaps they are too old? >> >> thank you. >> >> Cathy >> <--- Mac Access At Mac Access Dot Net ---> To reply to this post, please address your message to mac-access@mac-access.net You can find an archive of all messages posted to the Mac-Access forum at either the list's own dedicated web archive: <http://mail.tft-bbs.co.uk/pipermail/mac-access/index.html> or at the public Mail Archive: <http://www.mail-archive.com/mac-access@mac-access.net/>. Subscribe to the list's RSS feed from: <http://www.mail-archive.com/mac-access@mac-access.net/maillist.xml> As the Mac Access Dot Net administrators, we do our very best to ensure that the Mac-Access E-Mal list remains malware, spyware, Trojan, virus and worm-free. However, this should in no way replace your own security strategy. We assume neither liability nor responsibility should something unpredictable happen. Please remember to update your membership preferences periodically by visiting the list website at: <http://mail.tft-bbs.co.uk/mailman/listinfo/mac-access/options/>
