Hi!
How change MacOSX 10.6.8 to Mac 10.7.4
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iMac, iOS 5, Serial number (system) C0*******HJF
To upgrade to 10.7.4, you will need to purchase a download code from Apple since the online version is now 10.8.3.
Why do you wish to upgrade to the older verion of 10.7.4 any way?
Allan
Before fix iMas the Software was Mac 10.7.4 and it was changed to MacOSX 10.6.8 and I cannot open any USB storage devices- my passport and other...
If you've previously purchased 10.7 and have had it on this system prior to whatever caused the downgrade to 10.6.8, then you should be able to open the Mac App Store and sign in with your Apple ID and then be able to re-download and reinstall the 10.7 software. Look under the Purchases tab. Have a backup available before the upgrade, in case something goes wrong with the upgrade. If the Lion software package is not available among your the Mac App Store purchases, contact Apple directly and explain your predicament.
Software changing
