I am using CISCO IOU images with gns3-vm on my mac for the ccna lab setup

Layer 2 Image : i86bi-linux-l2-adventerprise-15.1b.bin

• Works will all VLAN types
• Works will port-security configuration
• Works with STP configurations

Layer 3 Image : i86bi_linux-adventerprisek9-ms.152-4.M1