This thread helps fix error code -43 when using your Mac.
Info: Error -43 is an OX S error code relating to missing/corrupt files... This is usually caused by permission issues or directory corruption. Workaround: Remove any of the following characters in the target item: ? [ ] / \ = + < > ; : “ , | * E.G., ... Solution: Use Disk Utility to verify or repair disks. See more info@ support.apple.com/en-us/HT201639. If you have issue with that solution, use Mac Bootable CD/Flash drive to repair your Mac.