I've downloaded LR4, unziped it and am trying to open the pkg file, but keep getting this error message? Can anyone help?
Yep, minimum specs this time round are 10.6.8, so it's definitely update time.
Also note that it's 64-bit processors only.
That’s all Intel Macs with the exception of the original Core Solo and Core Duo which are 32-bit. Core 2 Duo and later are fine. To check your computer processor, go to http://support.apple.com/kb/ht3696
Sorry, it's a different error message, it says:
"Unable to unarchive "lightroom4_p1_ma_011012.zip" into "downloads".
(error 1 - operation not permitted.)
Any idea what that could be?
That's a problem unzipping, before you get to the installer, so that one's likely fixable. Try copying the zip file to another location before unzipping, make sure you're unzipping with the OS default rather than another program, and if that still doesn't work, try downloading again as the download may be corrupted.