# Turn off your mac.
# Press the shift key on the left and the power button simultaneously to switch on your mac in “safe mode".
# If it was a software error your cursor should work fine in safe mode.
# If the issue doesn't persist when your Mac is started in safe mode, try restarting without pressing any keys.
** If the issue comes back, you might have incompatible login items.
** If the issue doesn't come back, it was probably caused by a cache or directory issue with your startup disk, which safe mode fixed.
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