Startup Doubler for Mac

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Startup Doubler Analysis

AI Assisted Content · June 11, 2026

Not written by CNET Staff.

Startup Doubler is a utility application designed for Mac users to enhance the startup process by allowing users to manage and customize the applications that launch during system boot. This tool aims to improve system performance and boot times by enabling selective control over startup items. Users can easily add or remove applications from the startup list, thus tailoring their Mac's performance to their specific needs and preferences.

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Free

In addition to its core functionality, Startup Doubler offers a user-friendly interface that simplifies the management of startup applications. The trial version allows users to explore its features and assess its effectiveness in optimizing startup processes. This application is particularly useful for those who seek to reduce boot time or streamline their Mac's performance by controlling which applications initiate at startup.

Startup Doubler for Mac

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Full Specifications

GENERAL

Release: January 17, 2003

Latest update: June 11, 2026

Version: 2.7.3

OPERATING SYSTEMS

Platform: Mac

Operating System

Mac OS Classic
Mac OS X

Additional Requirements: System 7.x - 9.x

POPULARITY

Total Downloads: 99,209

Downloads Last Week: 0

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Last Updated

User Reviews

2.8/5

26 User Votes

PizmoJanuary 21, 2003
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This review was originally posted on VersionTracker.com.<br />Well, it bomb'd my system 9.2.2/Pismo 500. Have never had Startup Doubler but Speed Startup. Disabled the SS extension, controlpanel and prefs. installed SD -
ResonatorJanuary 17, 2003
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Summary
This review was originally posted on VersionTracker.com.<br />Hasn't crashed on me and even in the age of OS X he still updates it. Five stars baby!
skippressNovember 20, 2002
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This review was originally posted on VersionTracker.com.<br />You negaters haven't read the FAQs on his site. I installed Stuffit Deluxe 7.01 on a Pismo Powerbook and got a bus error freeze. After
jnasatoNovember 3, 2002
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This review was originally posted on VersionTracker.com.<br />Version 2.7.2 freezes my computer after restarting, but the previous versions have worked fine for me.
David HonorOctober 19, 2002
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This review was originally posted on VersionTracker.com.<br />I installed StartUPDoubler, paid for the license...and BAM, not only a freeze but when I deactivated the control panel I completely LOST the hard drive
herculesOctober 19, 2002
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This review was originally posted on VersionTracker.com.<br />must agree with almost everyone else... Startup Doubler simply freezes my mac upon restart - the mouse moves, but the Mac don't!!!! :-( Once again,
kinlessOctober 17, 2002
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This review was originally posted on VersionTracker.com.<br />Still freezes on startup, and I don't even use Virtual Memory. I did every combination with the Extensions Off, Memory CP, and it still freezes.
KavenienAugust 12, 2002
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This review was originally posted on VersionTracker.com.<br />Locked up on start. Tried all troubleshooting suggestions. Beige PowerMac G3 233/OS 9.1. 1 star for good idea, 1 star for memory test tip, more
VersionTrackerUserOpinionJune 28, 2002
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This review was originally posted on VersionTracker.com.<br />Looks like it took about 15 seconds off my start up time, PB/G3/500. Worth $20!
Ad MinisterJune 28, 2002
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Summary
This review was originally posted on VersionTracker.com.<br />Not bad. It shaved about 20 seconds off of a 2 minute startup time. Powerbook G3 333, 384MB, OS 9.2.2

Developer’s Description

Speed up your system's start-up time.

Startup Doubler can make your Mac startup faster, closer to the maximum speed allowed by the hardware. Startup Doubler's software acceleration streamlines loading of Extensions, Control Panels, Startup Items and the Finder to improve startup times.

Startup Doubler is most useful for pre-G4 Macs, where startup can be made 10% to 50% faster. Fast disks in new high-end Macs can't be accelerated much, but the free trial offer lets you find out what effect Startup Doubler can have on your exact setup.