One solution to this dilemma is to create a copy of the ist, located in the ~/Library/Preferences folder file before you begin deleting items from the list in the Accounts System Preferences pane. Even worse, you may have no idea where some of the deleted items are located, making it hard to re-add them. A potential issue here is that you may not recall the names of all the items you deleted. Once you have identified the troublesome item, your next step will be to re-add all the items you deleted along the way and that are presumably OK. When it does, you can assume that the last removed item is the culprit. Remove items from the list one at a time, logging in after each removal, until the problem goes away. Open the 'Accounts' pane of System Preferences and click the 'Login Items' tab. One group of devices notorious for this behavior includes third-party displays from Dell and other manufacturers.Д¬heck for problematic login or startup items Login items (which load after entering your user credentials) or startup items (which load at startup universally) can both have detrimental effects on boot time. Some peripherals can cause slow-down Meanwhile, some third-party devices will inevitably cause a delay in startup even with a problem-free connection. Try reconnecting the devices once startup has completed.Д¬heck for loose network, speaker, device connections Loose connections or defective wiring can cause startup issues for systems with external peripherals.ДЇor instance, one MacFixIt reader reported an issue where a loose connection with a set of speakers was causing significant startup delays as the system persistently attempted to make contact with the set, eventually failing and proceeding with startup.ДЄs such, make sure that all peripheral and network connections are snugly attached, and also ensure that your AirPort card (if present) is seated properly and firmly. Try disconnecting any network cables temporarily then re-attempting startup and check for persistence of the startup slow-down. Errant connections through Ethernet cables, telephone lines and even AirPort cards can cause significant delays.

Various online resellers like OWC offer replacement batteries that can be user-installed.Дisconnect network cables Various network issues can cause startup stalls for connected Macs.

Wait until you hear the startup chime twice, then release the keys and allow normal startup to proceed.ДЇailing this, you may need to replace your PRAM battery. In order to do this, shut down your Mac, then start it up again while holding down the Command, Option, P and R keys. The first thing to try in this case is a PRAM reset. If you think you are experiencing inordinately boot times, run through the following list of shotgun techniques for a possible speed bump.Д¬heck PRAM - reset, or replace battery Especially on some older PowerMac G3s, problematic PRAM (parameter RAM) or a defective PRAM battery can cause delays in startup as the system constantly re-checks for connected devices and other hardware that are normally stored in PRAM. A variety of factors can affect Mac OS X startup time, though there are a few not directly tied to the speed and resources available on your Mac.

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