Karl the old

Q: iMac mouse very erratic after sierra update; almost unusable

iMc 5K, late 2014, 4Ghz 2.7 I7, mac 15,1. Since updating to Sierra, the machine has become almost unusable. The reaction time on the trackpad and keyboard has slowed down drastically. Moving a finger on the trackpad doesn't produce a result until anywhere from 10 seconds to as long as several minutes! Have restarted several times, and last night the cursor just froze; wound up doing forced shutdown. Very frustrated.

Posted on Sep 23, 2016 11:40 AM

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Q: iMac mouse very erratic after sierra update; almost unusable

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