Q: cursor on MacBook Pro 13" retina display(os x 12.9.5) freezes in humidity

Hi annfromnzl,

I'm sorry to hear you are having this issue with your MacBook Pro. If you are having erratic cursor behavior when using your trackpad, you may find the information and troubleshooting steps outlined in the following article helpful. In particular, if the issue only occurs in very high humidity, you may be experiencing something akin to this issue:

• Moisture collecting on the trackpad can also cause this issue. Wiping off the trackpad with a cloth or tissue usually fixes this. If the issue goes away when a piece of paper is put between the finger and trackpad you may want to consider purchasing a Teflon applique to fit over the pad to prevent the moisture from having direct contact with the trackpad. Before installing the Teflon applique, confirm the trackpad is clean and dry. You can use a mild glass cleaner sprayed onto the cloth (not onto the trackpad itself)  to clean the trackpad. Note that oil or lotion can also cause the same issue.

Trackpad or Magic Trackpad is jumpy or erratic - Apple Support

Also, I'm unclear exactly how high the humidity is currently in your location, but you may want to be aware of the following:

                     

		Line voltage: 100V to 240V AC     Frequency: 50Hz to 60Hz     Operating temperature: 50° to 95° F (10° to 35° C)     Storage temperature: –13° to 113° F (–25° to 45° C)     Relative humidity: 0% to 90% noncondensing     Operating altitude: tested up to 10,000 feet     Maximum storage altitude: 15,000 feet     Maximum shipping altitude: 35,000 feet

Apple - MacBook Pro with Retina display - Technical Specifications

Regards