Insider Software has announced a cross-grade promotion for users of other Mac font management software, including Suitcase Fusion from Extensis.

Users of competing products can purchase the new release from Insider of FontAgent Pro 4.2 for Mac at discounts of up to 40% off regular prices. The new version of FontAgent Pro includes auto-activation plug-ins for Adobe CS5.5, and 5.5.1., and provides compatibility with Mac OS X 10.7 (“Lion”).

FontAgent Pro 4.2 for Mac is normally US$99.95 for new purchasers; licensed users of other font managers are eligible for discounts of up to 40% or more for quantity purchases. To take advantage of this special cross-grade offer, users should visit Insider Software online (http://www.insidersoftware.com/).

FontAgent Pro 4 requires Mac OS X 10.4.11 or later running on a Power PC or Intel Mac with 42MB of available disk space. Additional disk space is required for installing fonts.