32- or 64-bit Kernel Startup Mode Selector for Mac

Used 32- or 64-bit Kernel Startup Mode Selector for Mac?

32- or 64-bit Kernel Startup Mode Selector Analysis

AI Assisted Content · June 11, 2026

Not written by CNET Staff.

The 32- or 64-bit Kernel Startup Mode Selector is a free utility designed for Mac users who want to customize their startup experience. This application enables users to select from various startup modes, including regular startup, safe mode, and other boot options. Its user-friendly interface makes it straightforward to switch between modes, ensuring that users can easily control the boot process according to their needs.

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Free

This utility falls under the category of utilities and tools, offering a unique approach to enhancing Mac personalization. By facilitating a more tailored startup experience, the Startup Mode Selector assists users in optimizing their system performance and troubleshooting potential issues. Its free availability further enhances its appeal, making it a practical choice for Mac users looking to improve their startup functionality.

32- or 64-bit Kernel Startup Mode Selector for Mac

Used 32- or 64-bit Kernel Startup Mode Selector for Mac?

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Full Specifications

GENERAL

Release: March 4, 2010

Latest update: June 11, 2026

Version: 1.6

OPERATING SYSTEMS

Platform: Mac

Operating System

Mac OS X 10.6
Mac OS X

Additional Requirements

Mac OS X 10.5 - 10.6
Intel processor

POPULARITY

Total Downloads: 9,557

Downloads Last Week: 0

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Descargar 32- or 64-bit Kernel Startup Mode Selector

Last Updated

User Reviews

5/5

2 User Votes

Works great!
fitztJanuary 1, 2010
Pros
Ease of install and what it shows you.
Cons
I have no problems
Summary
It a nice piece os software that lets you change between 64 and 32 bit on the fly.
THANK YOU SOOOOO MUCH!!!
Z4N3VTAugust 24, 2009
Pros
Cons
Summary
This review was originally posted on VersionTracker.com.<br />Thank you so much for this program!!!! ;D

Developer’s Description

By Markus Winter

Set the kernel's startup mode.

MacOS X 10.6 Snow Leopard is 64-bit - or is it?. Well, actually MacOS X 10.6 Snow Leopard is both 32-bit and 64-bit, and what that means for you depends on both your hardware and your settings.

I put up an accompanying 0 website which should answer most of your questions at

What does this app do?

it shows whether you have a 32-bit or a 64-bit processor
it shows whether you have a 32-bit or a 64-bit EFI
it shows whether the MacOS X Kernel is set to boot in 32-bit or in 64-bit mode
it shows whether the MacOS X Kernel is running in 32-bit or in 64-bit mode
it shows whether Apple officially supports booting a 64-bit kernel on your Mac
it allows you to select whether you want to start the MacOS X Kernel in 32-bit or in 64-bit mode (the setting might be ignored on MacBooks, depending on how Apple implements the restriction)
accompanying webpage explains what the whole commotion about 32-bit and 64-bit in MacOS X Snow Leopard is about