Drawing Tablet Pen Accuracy Issue.

There have been many issues when using a drawing tablet with Adobe applications on older iMacs that have recently been updated to the new Sonoma OS.  

When the drawing tablet is already in use and connected, many Adobe applications do not always register that the device is connected. Photoshop will allow the stylist to be used but suddenly begin to lag, as if a user has two different mouses attempting to be used simultaneously. This is most noticeable when using the Stamped and Healing Brush Tools. The user can correct the issue by restarting Photoshop or refreshing the drawing tablet by opening up the actual tablet software to re-establish a connection.

If lagging continues within secondary tool windows, such as Camera RAW, it may cause Photoshop to freeze. Photoshop must be Forced to Quit and repeat the steps to correct the issue. This lagging and application freeze can occur multiple times within a single session after the start of screen savors and after the computer awakes from sleep.

— System Info — 

iMac:               Retina 5k, 27-inch, 2019

Processor:       3.7 GHz-6-Core Intel Core i5 

Graphics:        Radeon Pro 580x 8 GB

Memory:        64 GB 2667 MHz DDR4

macOS:           Sonoma 14.5 (23F79)

— Drawing Tablet — 

Tablet:           HUION Drawing Tablet HS610

Software:       Version Number: 14.4.5.200611 

HUION Drawing Tablet HS610 Graphic Tablet with Battery-Free Stylus 8192 Pen Pressure Tilt Function, 10x6.25 Inches Digital Tablet for Animation & Design, Compatible with Windows/Mac/Android

— Photoshop — 

PS Version:     25.11   

Although, this version is very slow due to the lack of an Apple M chip and having an older graphics card. I am forced to use this older version of Adobe Photoshop due to the many issues that have occurred since updating to macOS Sonoma. This version seems to be working best for my system. For now, I am Not Risking the new PS 25.5 update.