Photoshop 2026.3: Batch Processing Concurrency – File Locking Without Control

Problem Context

Adobe Photoshop 2026.3 supports automated batch processing via the File > Automate > Batch command. When multiple batch jobs are launched concurrently and each job references the same large PSD file, users observe significant latency spikes. The observed behavior appears to be a result of Photoshop serializing file access, but the order in which queued jobs are processed is undocumented and inconsistent across runs.

Unresolved Decision

There is no documented setting to enforce exclusive file access, control job prioritization, or guarantee FIFO execution of concurrent batch jobs. The lack of a clear configuration leaves users uncertain whether the latency is inherent to Photoshop’s design or can be mitigated through external scripting.

Specific Questions

1. Does Photoshop 2026.3 provide any hidden or experimental flag to serialize access to the same source file during concurrent batch execution?
2. Can the order of queued batch jobs be deterministically set or inspected through the Photoshop API or scripting interface?
3. Is there a recommended workflow or third‑party tool that can enforce exclusive file locking for batch jobs on both Windows and macOS?