Could you do a get info [ command + i ] on the "Longman iBT Installer'' icon.
Where did you get the cd? Does this cd go with a longman book?
I think you have the longman book with cd.
You may need to get the 2014 version, 3rd edition of the book.
Longman Preparation Course for the TOEFL iBT Test with Answer Key: Deborah Phillips: 9780133248128: Amazon.com: Books
the second addition came out in 2007, which was the era of the powerpc based apps.
Longman Preparation Course for the TOEFL Test: iBT Student Book with CD-ROM and Answer Key (Audio CDs required) (2nd Edi…
note: I saw on reference to longman cd version publish in 2012. I suspect this was a reformulated version of the 2007 book.
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The least hassle is to buy the third edition. Another approach, would be to get a virtual machine like the free parallels for home user and install mac os 10.6 or windows in the box. You would need to buy the 10.6 server addition which includes support for powerpc apps. [ I'm guess you have a powerpc app. ]
R
ps. let's cross our fingers and hope léonie 's idea works.