If you got any previous problems with your mac dont update to Catalina just after you backup your data. 2. mac saved after update stuck with apple logo and boot bar, on this air just few keys was not working due a water damage in the past, customer used a usb keyboard and did not expect an update failing due a keyboard issue.

If you got any previous problems with your mac dont update to Catalina just after you backup your data. 2. mac saved after update stuck with apple logo and boot bar, on this air just few keys was not working due a water damage in the past, customer used a usb keyboard and did not expect an update failing due a keyboard issue.

recommendation: if you are not shure how to do it, dont make thinks worts and diy. Compressed air is useless as you see on the picture the dust, and if you dont have the right tools you can destroy the head of the screws making our job harder, and leftower screws inside can make short.

recommendation: if you are not shure how to do it, dont make thinks worts and diy. Compressed air is useless as you see on the picture the dust, and if you dont have the right tools you can destroy the head of the screws making our job harder, and leftower screws inside can make short.