I recently updated to my Macbook Pro to Photo Mechanic Version 5.0, build 16960 (6ba2289) on El Capitan 10.11.2.
When uploading to FTP's (doesn't matter what FTP) after the first three images send at 4000 KB/sec...it drops to 30 KB/sec. If I cancel the transfer, and send images one by one, it tends to send at the fastest aforementioned speed.
My Speed Test, even during that drop in rate, still comes back at over 100 MB/sec. Other FTP clients have no issues, such as Transmit.
Not sure what the issue is, but has never been an issue before.
Thanks!