I have an Apple iMac 2.5GHz Intel Core i5, 8 GB Memory running OSX 10.7.5. I currently have Adobe Premiere Elements 9 installed and just purchased Premiere 11. I know they changed a lot on the new version and want to make sure it performs well on this computer and want to keep the older version in case my previous projects don't mesh well with the newer version. Can I have both versions installed on this computer?
Having more than one version of PrE on a computer has never been an issue for many users. Some have had up to four installed, for testing, and for gaining familiarity with newer versions. I do not recall any having any issues, at least not any, that were posted.
While I seldom have more than one version of PrE installed, I often have several versions of Adobe Photoshop, and have never had an issue. Same with Adobe Audition, and PrPro. Most Adobe programs (Acrobat Reader is one exception) will install in totally different folders, and there are seldom confilcts.