AWS Transfer Family supports the SFTP protocol which isn't tied directly to any one Operating System. The behavior of SFTP within any Operating System would be dependent upon which client you are using.
We test/validate a few common clients listed here: https://docs.aws.amazon.com/transfer/latest/userguide/transfer-file.html
If you are having issues with a specific client on AIX I would recommend letting us know more details on the client/specific version and what the error might be or reaching out to our Premium Support team for further investigation.
Launch Announcement: AWS Transfer Family now supports login banners
Feature Enhancement: AWS Transfer Family Workflows
AWS TRANSFER FAMILY SFTP SERVERasked 7 months ago
AWS Transfer Family -> Logical Directories Limitasked 3 months ago
SFTP Transfer Family to EFS umaskasked 14 days ago
Do AWS Transfer Family support AIX?SUPPORT ENGINEERasked 3 months ago
Transfer Family Custom Identity provider Authentication using API Gateway Cross Accountasked 15 hours ago
S3 policy - Transfer Family SFTPasked 4 months ago
Can I track user login attempts in Transfer Family?Accepted Answerasked 2 months ago
AWS Transfer Family is now available in the AWS Asia Pacific (Osaka) Regionasked 8 months ago